Label abbreviations descriptions

CRAG® HERBICIDE (SESONE)†

Chemical Identification
CAS # 136-78-7
Formula

C₆H₃Cl₂OCH₂CH₂OSO₃Na
Synonyms

Crag herbicide No. 1; 2-(2,4-dichlorophenoxy)ethyl sodium sulfate; Sesone; Ethanol, 2- (2,4-dichlorophenoxy), hydrogen sulfate, sodium salt; 2-(2,4-dichlorophenoxy)ethyl sodium sulfate; disul-sodium; sodium 2,4-dichlorophenyl cellosolve sulfate

Physical Properties
Physical description Colorless to white crystalline, odorless solid.
Boiling point decomposes Molecular weight 309.1
Freezing point/melting point 473°F (decomposes) Vapor pressure 0.1 mmHg
Flash point Vapor density
Specific gravity 1.7 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0737 (total); request using analyte code 9135 C149 (resp); request using analyte code 9130
Sampling group
Sampler/Sampling media Tared low-ash 37 mm PVC filter, 5 microns [SLTC108] Tared low-ash 37 mm PVC filter, 5 microns, preceded by 10 mm nylon Dorr-Oliver cyclone for respirable samples. [SLTC108]
Sampling time*

240-480 min

240-480 min
Sampling volume (TWA)*

960 L

816 L
Sampling flow rate (TWA)*

2 L/min

1.7 L/min ±5%
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments Gravimetric Gravimetric
Method reference OSHA PV2121 (partially validated) OSHA PV2121 (partially validated)
Notes

If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration.

If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for  the applicable component and appropriate results will be reported.

If the filter is not overloaded, samples can be collected up to an 8-hour period. If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration.

If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for  the applicable component and appropriate results will be reported.
Special requirements

FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!!

Media must be preceded by 10 mm nylon Dorr-Oliver cyclone

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

15 mg/m³ (total dust), 5 mg/m³ (respirable fraction)

 REL-TWA

10 mg/m³ (total dust), 5 mg/m³ (respirable)

 TLV-TWA

10 mg/m³ [1992]

 PEL-TWA

10 mg/m³ (total dust), 5 mg/m³ (respirable fraction)
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

 Skin notation

N

 Skin notation

N

 Skin notation

NA
Notes:

See 29 CFR 1910.1000 Table Z-1.

 Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

500 mg/m³
Carcinogenic classifications: TLV-A4 Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

Last Updated Date : 12/22/2020