• Part Number:
    1910
  • Part Number Title:
    Occupational Safety and Health Standards
  • Subpart:
    1910 Subpart Z
  • Subpart Title:
    Toxic and Hazardous Substances
  • Standard Number:
  • Title:
    Allocation Of Label Elements (Mandatory)
  • GPO Source:

Appendix C to § 1910.1200 - Allocation of Label Elements (Mandatory)

C.1 The label for each hazardous chemical shall include the product identifier used on the safety data sheet.

C.1.1 The labels on shipped containers shall also include the name, address, and telephone number of the chemical manufacturer, importer, or responsible party.

C.2 The label for each hazardous chemical that is classified shall include the signal word, hazard statement(s), pictogram(s), and precautionary statement(s) specified in C.4 for each hazard class and associated hazard category, except as provided for in C.2.1 through C.2.4.

C.2.1 Precedence of Hazard Information

C.2.1.1 If the signal word “Danger” is included, the signal word “Warning” shall not appear;

C.2.1.2 If the skull and crossbones pictogram is included, the exclamation mark pictogram shall not appear where it is used for acute toxicity;

C.2.1.3 If the corrosive pictogram is included, the exclamation mark pictogram shall not appear where it is used for skin or eye irritation;

C.2.1.4 If the health hazard pictogram is included for respiratory sensitization, the exclamation mark pictogram shall not appear where it is used for skin sensitization or for skin or eye irritation.

C.2.2 Hazard Statement Text

C.2.2.1 The text of all applicable hazard statements shall appear on the label, except as otherwise specified. The information in italics shall be included as part of the hazard statement as provided. For example: “causes damage to organs (state all organs affected) through prolonged or repeated exposure (state route of exposure if no other routes of exposure cause the hazard)”. Hazard statements may be combined where appropriate to reduce the information on the label and improve readability, as long as all of the hazards are conveyed as required.

C.2.2.2 If the chemical manufacturer, importer, or responsible party can demonstrate that all or part of the hazard statement is inappropriate to a specific substance or mixture, the corresponding statement may be omitted from the label.

C.2.3 Pictograms

C.2.3.1 Pictograms shall be in the shape of a square set at a point and shall include a black hazard symbol on a white background with a red frame sufficiently wide to be clearly visible. A square red frame set at a point without a hazard symbol is not a pictogram and is not permitted on the label.

C.2.3.2 One of eight standard hazard symbols shall be used in each pictogram. The eight hazard symbols are depicted in Figure C.1. A pictogram using the exclamation mark symbol is presented in Figure C.2, for the purpose of illustration.

Figure C.1 – Hazard Symbols and Classes
Flame Flame Over Circle Exclamation Mark Exploding Bomb
Flame Pictogram
Flammables
Self Reactives
Pyrophorics
Self-heating
Emits Flammable Gas
Organic Peroxides
Desensitized Explosives
Flame Over Circle Pictogram
Oxidizers
Exclamation Mark Pictogram
Irritant
Dermal Sensitizer
Acute Toxicity (harmful)
Narcotic Effects
Respiratory Tract Irritation
HNOC (nonmandatory)
Exploding Bomb Pictogram
Explosives
Self Reactives
Organic Peroxides
Corrosion Gas Cylinder Health Hazard Skull and Crossbones
Corrosion Pictogram
Corrosives
Gas Cylinder Pictogram
Gases Under Pressure
Health Hazard Pictogram
Carcinogen
Respiratory Sensitizer
Reproductive Toxicity
Target Organ Toxicity
Mutagenicity
Aspiration Toxicity
Skull and Crossbones Pictogram
Acute Toxicity (severe)

Figure C.2 – Exclamation Mark Pictogram

Exclamation Mark Pictogram

C.2.3.3 The exclamation mark pictogram is permitted (but not required) for HNOCs as long as the words "Hazard Not Otherwise Classified" or the letters "HNOC" appear below the pictogram.

C.2.3.4 Pictograms may only appear once on a label. If multiple hazards require the use of the same pictogram, it may not appear a second time on the label.

C.2.4 Precautionary Statement Text

C.2.4.1 There are four types of precautionary statements presented, "prevention," "response," "storage," and "disposal." The core part of the precautionary statement is presented in bold print. This is the text, except as otherwise specified, that shall appear on the label. Where additional information is required, it is indicated in plain text.

C.2.4.2 When a backslash or diagonal mark (/) appears in the precautionary statement text, it indicates that a choice has to be made between the separated phrases. In such cases, the chemical manufacturer, importer, or responsible party can choose the most appropriate phrase(s). For example, "Wear protective gloves/protective clothing/eye protection/face protection" could read "wear eye protection".

C.2.4.3 When three full stops (...) appear in the precautionary statement text, they indicate that all applicable conditions are not listed. For example, in "Use explosion-proof electrical/ventilating/lighting/.../equipment", the use of "..." indicates that other equipment may need to be specified. In such cases, the chemical manufacturer, importer, or responsible party can choose the other conditions to be specified.

C.2.4.4 When text in italics is used in a precautionary statement, this indicates specific conditions applying to the use or allocation of the precautionary statement. For example, "Use explosion-proof electrical/ventilating/lighting/.../equipment" is only required for flammable solids "if dust clouds can occur". Text in italics is intended to be an explanatory, conditional note and is not intended to appear on the label.

C.2.4.5 Where square brackets ([ ]) appear around text in a precautionary statement, this indicates that the text in square brackets is not appropriate in every case and should be used only in certain circumstances. In these cases, conditions for use explaining when the text should be used are provided. For example, one precautionary statement states: "[In case of inadequate ventilation] wear respiratory protection." This statement is given with the condition for use "– text in square brackets may be used if additional information is provided with the chemical at the point of use that explains what type of ventilation would be adequate for safe use". This means that, if additional information is provided with the chemical explaining what type of ventilation would be adequate for safe use, the text in square brackets should be used and the statement would read: "In case of inadequate ventilation wear respiratory protection." However, if the chemical is supplied without such ventilation information, the text in square brackets should not be used, and the precautionary statement should read: "Wear respiratory protection."

C.2.4.6 Precautionary statements may be combined or consolidated to save label space and improve readability. For example, "Keep away from heat, sparks and open flame," "Store in a well-ventilated place" and "Keep cool" can be combined to read "Keep away from heat, sparks and open flame and store in a cool, well-ventilated place."

C.2.4.7 Precautionary statements may incorporate minor textual variations from the text prescribed in this Appendix if these variations assist in communicating safety information (e.g., spelling variations, synonyms or other equivalent terms) and the safety advice is not diluted or compromised. Any variations must be used consistently on the label and the safety data sheet.

C.2.4.8 In most cases, the precautionary statements are independent (e.g., the phrases for explosives hazards do not modify those related to certain health hazards, and products that are classified for both hazard classes shall bear appropriate precautionary statements for both). Where a chemical is classified for a number of hazards, and the precautionary statements are similar, the most stringent shall be included on the label (this will be applicable mainly to preventive measures).

C.2.4.9 If the chemical manufacturer, importer, or responsible party can demonstrate that a precautionary statement is inappropriate to a specific substance or mixture, the precautionary statement may be omitted from the label.

C.2.4.10 Where a substance or mixture is classified for a number of health hazards, this may trigger multiple precautionary statements relating to medical response, e.g., calling a poison center/doctor/... and getting medical advice/attention. In general, the following principles should be applied:

(a) Where the classification of a substance or mixture triggers several different precautionary statements, a system of prioritization should be applied. If the same medical response statement is triggered multiple times, the label need only include one precautionary statement reflecting the response at the highest level with the greatest urgency, which should always be combined with at least one route of exposure or symptom "IF" statement.

(b) Routes of exposure, including "IF exposed or concerned," may be combined when triggered with a medical response statement. If the response statement is triggered with three or more routes of exposure, "IF exposed or concerned" may be used. However, relevant "IF" statements describing symptoms must be included in full. If a route of exposure is triggered multiple times, it need only be included once.

(c) This does not apply to "Get medical advice/attention if you feel unwell" or "Get immediate medical advice/attention" when they are combined with an "If" statement and must appear without prioritization.

C.3 Supplementary Hazard Information

C.3.1 To ensure that non-standardized information does not lead to unnecessarily wide variation or undermine the required information, supplementary information on the label is limited to when it provides further detail and does not contradict or cast doubt on the validity of the standardized hazard information.

C.3.2 Where the chemical manufacturer, importer, or distributor chooses to add supplementary information on the label, the placement of supplemental information shall not impede identification of information required by this section.

C.3.3 Where an ingredient with unknown acute toxicity is used in a mixture at a concentration ≥1%, and the mixture is not classified based on testing of the mixture as a whole, a statement that X% of the mixture consists of ingredient(s) of unknown acute toxicity (oral/dermal/inhalation) is required on the label and safety data sheet.

C.4 Requirements for Signal Words, Hazard Statements, Pictograms, and Precautionary Statements

C.4.1 ACUTE TOXICITY - ORAL
(Classified in Accordance with Appendix A.1 of this section)

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-

-

Pictogram
Skull and crossbones
Hazard category Signal word Hazard statement Skull & Crossbones Pictogram
1 Danger Fatal if swallowed
2 Danger Fatal if swallowed
3 Danger Toxic if swallowed
C.4.1 ACUTE TOXICITY - ORAL (CONTINUED)
(Classified in Accordance with Appendix A.1 of this section)

-

-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exlamation Pictogram
4 Warning Harmful if swallowed
C.4.2 ACUTE TOXICITY - DERMAL
(Classified in Accordance with Appendix A.1 of this section)

-

-

-

Pictogram
Skull and crossbones
Hazard category Signal word Hazard statement Skull & Crossbones Pictogram
1 Danger Fatal in contact with skin
2 Danger Fatal in contact with skin
C.4.2 ACUTE TOXICITY - DERMAL (CONTINUED)
(Classified in Accordance with Appendix A.l of this section)

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-

-

Pictogram
Skull and crossbones
Hazard category Signal word Hazard statement Skull & Crossbones Pictogram
3 Danger Toxic in contact with skin
C.4.2 ACUTE TOXICITY - DERMAL (CONTINUED)
(Classified in Accordance with Appendix A.1 of this section)

-

-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exlamation Pictogram
4 Warning Harmful in contact with skin
C.4.3 ACUTE TOXICITY - INHALATION
(Classified in Accordance with Appendix A.1 of this section)

-

-

-

Pictogram
Skull and crossbones
Hazard category Signal word Hazard statement Skull & Crossbones Pictogram
1 Danger Fatal if inhaled
2 Danger Fatal if inhaled

Note: If the substance/mixture is determined to be corrosive to the respiratory tract leading to lethality, the corrosivity hazard must also be communicated with the corrosive pictogram and hazard statement "corrosive to the respiratory tract".

C.4.3 ACUTE TOXICITY - INHALATION (CONTINUED)
(Classified in Accordance with Appendix A.1 of this section)

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-

-

Pictogram
Skull and crossbones
Hazard category Signal word Hazard statement Skull & Crossbones Pictogram
3 Danger Toxic if inhaled
C.4.3 ACUTE TOXICITY - INHALATION (CONTINUED)
(Classified in Accordance with Appendix A.1 of this section)

-

-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exlamation Pictogram
4 Warning Harmful if inhaled
C.4.4 SKIN CORROSION/IRRITATION
(Classified in Accordance with Appendix A.2 of this section)

-

-

-

Pictogram
Corrosion
Hazard category Signal word Hazard statement Corrosion Pictogram
1A to 1C Danger Causes severe skin burns and eye damage

Note: If the classifier determines, based on skin data, that the chemical may be corrosive to the respiratory tract, then the corrosivity hazard must also be communicated with the corrosive pictogram and hazard statement "corrosive to the respiratory tract".

C.4.4 SKIN CORROSION/IRRITATION (CONTINUED)
(Classified in Accordance with Appendix A.2 of this section)

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-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exlamation Pictogram
2 Warning Causes skin irritation
C.4.5 EYE DAMAGE/IRRITATION
(Classified in Accordance with Appendix A.3 of this section)

-

-

-

Pictogram
Corrosion
Hazard category Signal word Hazard statement Corrosion Pictogram
1 Danger Causes serious eye damage

Note: If the classifier determines, based on eye data, that the chemical may be corrosive to the respiratory tract, then corrosivity hazard must also be communicated with the corrosive pictogram and hazard statement "corrosive to the respiratory tract".

C.4.5 EYE DAMAGE/IRRITATION (CONTINUED)
(Classified in Accordance with Appendix A.3 of this section)

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-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exlamation Pictogram
2A Warning Causes serious eye irritation
C.4.5 EYE DAMAGE/IRRITATION (CONTlNUED)
(Classified in Accordance with Appendix A.3 of this section)

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-

-

Pictogram
No Pictogram
Hazard category Signal word Hazard statement  
2B Warning Causes eye irritation
C.4.6 SENSITIZATION - RESPIRATORY
(Classified in Accordance with Appendix A.4 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram
1 (including both sub-categories 1A and 1B) Danger May cause allergy or asthma symptoms or breathing difficulties if inhaled
C.4.7 SENSITIZATION - SKIN
(Classified in Accordance with Appendix A.4 of this section)

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-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exlamation Pictogram
1 (including both sub-categories 1A and 1B) Warning May cause an allergic skin reaction
C.4.8 GERM CELL MUTAGENICITY
(Classified in Accordance with Appendix A.5 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram
1A and 1B Danger May cause genetic defects <...>
2 Warning Suspected of causing genetic defects <...>

-

-

< > (state route of exposure if no other routes of exposure cause the hazard)
C.4.9 CARCINOGENICITY
(Classified in Accordance with Appendix A.6 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram
1A and 1B Danger May cause cancer <...>
2 Warning Suspected of causing cancer <...>

-

-

< > (state route of exposure if no other routes of exposure cause the hazard)

Note: If a Category 2 carcinogen ingredient is present in the mixture at a concentration between 0.1% and 1%, iriformation is required on the SDS for a product; however, a label warning is optional. If a Category 2 carcinogen ingredient is present in the mixture at a concentration of> 1%, both an SDS and a label is required and the information must be included on each.

C.4.10 REPRODUCTIVE TOXICITY
(Classified in Accordance with Appendix A.7 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram
1A and 1B Danger May damage fertility or the unborn child <...> <<...>>
2 Warning Suspected of damaging fertility or the unborn child <...> <<...>>

-

-

< > (state specific effect if known)

-

-

<<...>>(state route of exposure if no other routes of exposure cause the hazard)
C.4.10 REPRODUCTIVE TOXICITY (CONTINUED)
(Classified in Accordance with Appendix A.7 of this section)
(EFFECTS ON OR VIA LACTATION)

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-

-

Pictogram
No Pictogram
Hazard category Signal word Hazard statement  

No designated number

(See Table A.7.1 in Appendix A.7)

No signal word May cause harm to breast-fed children
C.4.11 SPECIFIC TARGET ORGAN TOXICITY (Single Exposure)
(Classified in Accordance with Appendix A.8 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram

1

Danger Causes damage to organs <...> <<...>>

-

-

<...> (or state all organs affected if known)

-

-

<<...>> (state route of exposure if no other routes of exposure cause the hazard)

Note: If the chemical is determined to be corrosive to the respiratory tract, corrosive to the respiratory tract must be communicated with the hazard statement "corrosive to the respiratory tract, if inhaled" and corrosive pictogram, in lieu of current hazard statement and pictogram.

C.4.11 SPECIFIC TARGET ORGAN TOXICITY (Single Exposure) (CONTINUED)
(Classified in Accordance with Appendix A.8 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram

2

Warning May cause damage to organs <...> <<...>>

-

-

<...> (or state all organs affected, if known)

-

-

<<...>> (state route of exposure if no other routes of exposure cause the hazard)

Note: If the substance/mixture is determined to be corrosive to the respiratory tract, corrosivity must be communicated with the hazard statement "corrosive to the respiratory tract, if inhaled" and corrosive pictogram in lieu of current hazard statement and pictogram.

C.4.11 SPECIFIC TARGET ORGAN TOXICITY (Single Exposure) (CONTINUED)
(Classified in Accordance with Appendix A.8 of this section)

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-

-

Pictogram
Exclamation mark
Hazard category Signal word Hazard statement Exclamation mark Pictogram

3

Warning May cause respiratory irritation; or

-

-

May cause drowsiness or dizziness
C.4.12 SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure)
(Classified in Accordance with Appendix A.9 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram

1

Danger Causes damage to organs <...> through prolonged or repeated exposure <<...>>

-

-

<...> (state all organs affected, if known)

-

-

<<...>> (state route of exposure if no other routes of exposure cause the hazard)
Precautionary statements
Prevention Response Storage Disposal
Do not breathe dust/fume/gas/mist/ vapors/spray.
Chemical manufacturer, importer, or distributor to specify applicable conditions.

Wash ... thoroughly after handling.
...Chemical manufacturer, importer, or distributor to specify parts of the body to be washed after handling.

Do not eat, drink or smoke when using this product.

Get medical advice/attention if you feel unwell.
Chemical manufacturer, importer, or to distributor to select medical advice or attention as appropriate.

-

Dispose of contents/container to...
... in accordance with local/regional/national/international regulations (to be specified).
Chemical manufacturer, importer, or distributor to specify whether disposal requirements apply to contents, container, or both.
C.4.12 SPECIFIC TARGET ORGAN TOXICITY (Repeated Exposure) (CONTINUED)
( Classified in Accordance with Appendix A.9 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram

2
 

Warning May cause damage to organs <...> through prolonged or repeated exposure <<...>>

-

-

<...> (state all organs affected, if known)

-

-

<<...>> (state route of exposure if no other routes of exposure cause the hazard)
C.4.13 ASPIRATION HAZARD
(Classified in Accordance with Appendix A.10 of this section)

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-

-

Pictogram
Health hazard
Hazard category Signal word Hazard statement Health Hazard Pictogram

1
 

Danger May be fatal if swallowed and enters airways
C.4.14 EXPLOSIVES
(Classified in Accordance with Appendix B.1 of this section)

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-

-

Pictogram
Exploding bomb
Hazard category Signal word Hazard statement Exploding Bomb Pictogram

Unstable explosive

Danger Unstable explosive
C.4.14 EXPLOSIVES (CONTINUED)
(Classified in Accordance with Appendix B.1 of this section)

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-

-

Pictogram
Exploding bomb
Hazard category Signal word Hazard statement Exploding Bomb Pictogram

Division 1.1

Danger Explosive; mass explosion hazard
Division 1.2 Danger Explosive; severe projection hazard
Division 1.3 Danger Explosive; fire, blast or projection

Note: Unpackaged explosives or explosives repacked in packagings other than the original or similar packaging shall have the label elements assigned to Division 1.1 unless the hazard is shown to correspond to one of the hazard categories in Appendix B. l of this section, in which case the corresponding symbol, signal word atui/or the hazard statement shall be assigned.

C.4.14 EXPLOSIVES (CONTINUED)
(Classified in Accordance with Appendix B.1 of this section)

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-

-

Pictogram
Exploding bomb1
Hazard category Signal word Hazard statement Exploding Bomb

Division 1.4

Warning Fire or projection hazard

Note: Unpackaged explosives or explosives repacked in packagings other than the original or similar packaging shall have the label elements assigned to Division 1.1 unless the hazard 1s shown to correjpond to one of the hazard categories in Appendix B. l of this section, in which case the correjponding jymbol, signal word and/or the hazard statement shall be assigned 1

C.4.14 EXPLOSIVES (CONTINUED)
(Classified in Accordance with Appendix B.1 of this section)

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-

-

Pictogram
No Pictogram
Hazard category Signal word Hazard statement  

Division 1.5

Danger May mass explode in fire

Note: Unpackaged explosives or explosives repacked in packagings other than the original or similar packaging shall have the label elements assigned to Division 1.1 unless the hazard is shown to correspond to one of the hazard categories in Appendix B.l of this section, in which case the corresponding symbol, signal word and/or the hazard statement shall be assigned.

C.4.14 EXPLOSIVES (CONTINUED)
(Classified in Accordance with Appendix B.1 of this section)

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-

-

Pictogram
No Pictogram
Hazard category Signal word Hazard statement  

Division 1.6

No signal word No hazard statement
Precautionary statements
Prevention Response Storage Disposal
None assigned None assigned None assigned None assigned

Note: Unpackaged explosives or explosives repacked in packagings other than the original or similar packaging shall have the label elements assigned to Division 1.1 unless the hazard is shown to correspond to one of the hazard categories in Appendix B.l of this section, in which case the corresponding symbol, signal word and/or the hazard statement shall be assigned.

C.4.15 FLAMMABLE GASES
(Classified in Accordance with Appendix B.2 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram

1A

Danger Extremely flammable gas

1B

Danger Flammable gas

NOTE: For flammable gas Category 1A, pyrophoric gas and Category IA, chemically unstable gas A and B, see statements below.

C.4.15 FLAMMABLE GASES (CONTINUED) (Classified in Accordance with Appendix B.2 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram

1A, Pryrophoric gas

Danger Extremely flammable gas

-

-

May ignite spontaneously if exposed to air

Note: This table lists only precautionary statements that are assigned due to the flammability and the pyrophoricity of the gas. For the other precautionary statements that are assigned based on chemical instability, see the respective tables for chemically unstable gases A and B.

C.4.15 FLAMMABLE GASES (CONTINUED)
(Classified in Accordance with Appendix B.2 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram

1A, Chemically unstable gas A

Danger Extremely flammable gas
May react explosively even in the absence of air.

1A, Chemically unstable gas B

Danger Extremely flammable gas
May react explosively even in the absence of air at elevated pressure and/or temperature.

Note: This table lists only the precautionary statements that are assigned due to the flammability and the chemical instability of the gas. For the other precautionary statements that are assigned based on pyrophoricity, see the respective table for pyrophoric gas.

C.4.15 FLAMMABLE GASES (CONTINUED)
(Classified in Accordance with Appendix B.2 of this section)

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-

-

Pictogram
No Pictogram
Hazard category Signal word Hazard statement  

2

Warning Flammable gas
C.4.16 AEROSOLS
(Classified in Accordance with Appendix B.3 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram
1 Danger Extremely flammable aerosol
Pressurized container: may burst if heated.

2

Warning Flammable aerosol
Pressurized container: may burst if heated.
C.4.16 AEROSOLS
(Classified in Accordance with Appendix B.3.1 of this section)

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-

-

Pictogram
No Symbol
Hazard category Signal word Hazard statement  
3 Warning Pressurized container: may burst if heated.
C.4.16 CHEMICAL UNDER PRESSURE
(Classified in Accordance with Appendix B.3.2 of this section)

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-

-

Pictogram
Gas Cylinder and Flame
Hazard category Signal word Hazard statement Gas Cylinder
Flame Pictogram
1 Danger Extremely flammable chemical under pressure
May explode if heated.

2

Warning Flammable chemical under pressure
May explode if heated.
C.4.16 CHEMICAL UNDER PRESSURE
(Classified in Accordance with Appendix B.3 of this section)

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-

-

Pictogram
Gas Cylinder
Hazard category Signal word Hazard statement Gas Cylinder
3 Warning Chemical under pressure: may explode if heated.
C.4.17 OXIDIZING GASES
(Classified in Accordance with Appendix B.4 of this section)

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-

-

Pictogram
Flame over circle
Hazard category Signal word Hazard statement Flame Over Circle Pictogram
1 Danger May cause or intensify fire; oxidizer
C.4.18 GASES UNDER PRESSURE
(Classified in Accordance with Appendix B.5 of this section)

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-

-

Pictogram
Gas cylinder
Hazard category Signal word Hazard statement Gas Cylinder
Compressed gas Warning Contains gas under pressure; may explode if heated
Liquefied gas Warning Contains gas under pressure; may explode if heated

Dissolved gas
Warning Contains gas under pressure; may explode if heated
C.4.18 GASES UNDER PRESSURE (CONTINUED)
(Classified in Accordance with Appendix B.5 of this section)

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-

-

Pictogram
Gas cylinder
Hazard category Signal word Hazard statement Gas Cylinder
Refrigerated liquefied gas Warning Contains refrigerated gas; may cause cryogenic burns or injury
C.4.19 FLAMMABLE LIQUIDS
(Classified in Accordance with Appendix B.6 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram
1 Danger Extremely flammable liquid and vapor
2 Danger Highly flammable liquid and vapor
3 Warning Flammable liquid and vapor
C.4.19 FLAMMABLE LIQUIDS (CONTINUED)
(Classified in Accordance with Appendix B.6 of this section)

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-

-

Pictogram
No Pictogram
Hazard category Signal word Hazard statement  
4 Warning Combustible liquid
C.4.20 FLAMMABLE SOLIDS
(Classified in Accordance with Appendix B.7 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram
1 Danger Flammable solid
2 Warning Flammable solid
C.4.21 SELF-REACTIVE SUBSTANCES AND MIXTURES
(Classified in Accordance with Appendix B.8 of this section)

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-

-

Pictogram
Exploding bomb
Hazard category Signal word Hazard statement Exploding Bomb
Type A Danger Heating may cause an explosion
C.4.21 SELF-REACTIVE SUBSTANCES AND MIXTURES (CONTINUED)
(Classified in Accordance with Appendix B.8 of this section)

-

-

-

Pictogram
Exploding bomb and flame
Hazard category Signal word Hazard statement

Flame Pictogram

Exploding Bomb
Type B Danger Heating may cause a fire or explosion
C.4.21 SELF-REACTIVE SUBSTANCES AND MIXTURES (CONTINUED)
(Classified in Accordance with Appendix B.8 of this section)

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-

-

Pictogram
Flame
Hazard category Signal word Hazard statement

Flame Pictogram

Type C Danger Heating may cause a fire
Type D Danger Heating may cause a fire
Type E Warning Heating may cause a fire
Type F Warning Heating may cause a fire
C.4.22 PYROPHORIC LIQUIDS
(Classified in Accordance with Appendix B.9 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement

Flame Pictogram

1 Danger Catches fire spontaneously if exposed to air
C.4.23 PYROPHORIC SOLIDS
(Classified in Accordance with Appendix B.10 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement

Flame Pictogram

1 Danger Catches fire spontaneously if exposed to air
C.4.24 SELF-HEATING SUBSTANCES AND MIXTURES
(Classified in Accordance with Appendix B.11 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement

Flame Pictogram

1 Danger Self-heating; may catch fire
2 Warning Self-heating in large quantities; may catch fire
C.4.25 SUBSTANCES AND MIXTURES WHICH, IN CONTACT WITH WATER, EMIT FLAMMABLE GASES
(Classified in Accordance with Appendix B.12 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement

Flame Pictogram

1 Danger In contact with water releases flammable gases, which may ignite spontaneously
2 Danger In contact with water releases flammable gas
C.4.25 SUBSTANCES AND MIXTURES WHICH, IN CONTACT WITH WATER, EMIT FLAMMABLE GASES (CONTINUED)
(Classified in Accordance with Appendix B.12 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement

Flame Pictogram

3 Warning In contact with water releases flammable gas
C.4.26 OXIDIZING LIQUIDS
(Classified in Accordance with Appendix B.13 of this section)

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Pictogram
Flame over circle
Hazard category Signal word Hazard statement Flame Over Circle Pictogram
1 Danger May cause fire or explosion; strong oxidizer
C.4.26 OXIDIZING LIQUIDS (CONTINUED)
(Classified in Accordance with Appendix B.13 of this section)

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Pictogram
Flame over circle
Hazard category Signal word Hazard statement Flame Over Circle Pictogram
2 Danger May intensify fire; oxidizer
3 Warning May intensify fire; oxidizer
C.4.27 OXIDIZING SOLIDS
(Classified in Accordance with Appendix B.14 of this section)

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Pictogram
Flame over circle
Hazard category Signal word Hazard statement Flame Over Circle Pictogram
1 Danger May cause fire or explosion; strong oxidizer
C.4.27 OXIDIZING SOLIDS (CONTINUED)
(Classified in Accordance with Appendix B.14 of this section)

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Pictogram
Flame over circle
Hazard category Signal word Hazard statement Flame Over Circle Pictogram
2 Danger May intensify fire; oxidizer
3 Warning May intensify fire; oxidizer
C.4.28 ORGANIC PEROXIDES
(Classified in Accordance with Appendix B.15 of this section)

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Pictogram
Exploding bomb
Hazard category Signal word Hazard statement Exploding Bomb
Type A Danger Heating may cause an explosion
C.4.28 ORGANIC PEROXIDES (CONTINUED)
(Classified in Accordance with Appendix B.15 of this section)

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Pictogram
Exploding bomb and flame
Hazard category Signal word Hazard statement Exploding Bomb Flame Pictogram
Type B Danger Heating may cause an explosion
C.4.28 ORGANIC PEROXIDES (CONTINUED)
(Classified in Accordance with Appendix B.15 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram
Type C Danger Heating may cause a fire
Type D Danger Heating may cause a fire
Type E Warning Heating may cause a fire
Type F Warning Heating may cause a fire
C.4.29 CORROSIVE TO METALS (Classified in Accordance with Appendix B.16 of this section)

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Pictogram
Corrosion
Hazard category Signal word Hazard statement Corrosion Pictogram
1 Warning May be corrosive to metals
C.4.30 DESENSITIZED EXPLOSIVES
(Classified in Accordance with Appendix B.17 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram
1 Danger Fire, blast or projection hazard; increased risk of explosion if desensitizing agent is reduced.
2 Danger Fire, blast or projection hazard; increased risk of explosion if desensitizing agent is reduced.
3 Warning Fire, blast or projection hazard; increased risk of explosion if desensitizing agent is reduced.
C.4.30 DESENSITIZED EXPLOSIVES
(Classified in Accordance with Appendix B.17 of this section)

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Pictogram
Flame
Hazard category Signal word Hazard statement Flame Pictogram
4 Warning Fire hazard; increased risk of explosion if desensitizing agent is reduced.
C.4.31 Label elements for OSHA defined hazards

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No pictogram
Hazard category Signal word Hazard statement  
Simple Asphyxiant Warning May displace oxygen and cause rapid suffocation
  No pictogram
  • 2 1) The chemical manufacturer or importer shall label chemicals that are shipped in dust form, and present a combustible dust hazard in that form when used downstream, under paragraph (t)(l) of this section;
    2) the chemical manufacturer or importer shipping chemicals that are in a form that is not yet a dust must provide a label to customers, that follows the approach described under paragraph (t)(4) of this section if, under normal conditions of use, the chemicals are processed in a downstream workplace in such a way that they present a combustible dust hazard; and
    3) the employer shall follow the workplace labeling requirements under paragraph (t)(6) of this section where combustible dust hazards are present.

1 Except no pictogram is required for explosives that are I .4S small arms ammnnition and components thereof. Labels for I .4S small arms ammnnition and components shall include appropriate precautionary statements.

2 The chemical manufacturer or importer shall label chemicals that are shipped in dust form, and present a combustible dust hazard in that form when used downstream, under paragraph (f)(1); 2) the chemical manufacturer or importer shipping chemicals that are in a form that is not yet a dust must provide a label to customers under paragraph (f)(4) if, under normal conditions of use, the chemicals are processed in a downstream workplace in such a way that they present a combustible dust hazard; and 3) the employer shall follow the workplace labeling requirements under paragraph (f)(6) where combustible dust hazards are present.

[61 FR 9227, March 7, 1996; 77 FR 17824, March 26, 2012; 89 FR 44395-44459, May 20, 2024; 89 FR 81833-81836, Oct. 9, 2024]