Label abbreviations descriptions

CHROMIUM(II) COMPOUNDS (as Cr)†

Chemical Identification
CAS # 7440-47-3
Formula

Cr
Synonyms

Synonyms vary depending upon the specific Chromium(II) compound. [Note: Chromium(II) compounds include soluble chromous salts.]

Physical Properties
Physical description Appearance and odor vary depending upon the specific compound.
Boiling point 4788°F Molecular weight 52
Freezing point/melting point 3452°F Vapor pressure depends upon the specific compound
Flash point Vapor density
Specific gravity 7.2 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.)
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference
Notes

See CHROMIUM, METAL & INSOLUBLE SALTS
Special requirements

* 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

0.5 mg/m³

 REL-TWA

0.5 mg/m³

 TLV-TWA

0.5 mg/m³ (inhalable particulate matter) [2017]

 PEL-TWA

0.5 mg/m³
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

N
Notes:

See 29 CFR 1910.1000 Table Z-1.

 Notes:

See Appendix C, Supplementary Exposure Limits. [Chromic Acid and Chromates (as CrO₃), Chromium(II) and Chromium(III) Compounds (as Cr), and Chromium Metal (as Cr)]

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

250 mg/m³
Carcinogenic classifications: EPA-D; IARC-3 Notes:

as Cr
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

Last Updated Date : 06/26/2023