CHROMIUM, METAL & INSOLUBLE SALTS (as Cr)†

Chemical Identification
Chemical Identification
CAS # 7440-47-3
Formula

Cr

Synonyms

chrome; chromium

Physical Properties
Physical Properties
Physical description Blue-white to steel-gray, lustrous, brittle, hard, odorless solid.
Boiling point 4788°F Molecular weight 52
Freezing point/melting point 3452°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 7.14 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
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0685
Sampling group METALSSG-2
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240-480 min

Sampling volume (TWA)*

480-960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments ICP
Method reference OSHA ID-125G (fully validated)
Notes

Results are provided for the presence and amount or concentration of a specific element or elements.

The stated identity of the actual sample contents (such as specific form, valence state, or compound) is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes.

Special requirements

For the entire suite of analytes listed in METALSSG-2, request analyte code 2587.

* 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.

Wipe Method
Wipe Method
Sampler/Sampling media

Ghost Wipe [SKC 225-2414]

Bulk Method
Bulk Method

Available

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

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

250 mg/m³

Carcinogenic classifications: IARC-3, EPA-A; K; D; CBD Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Chromium

NIOSH: Pocket Guide to Chemical Hazards - Chromium metal

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Chromium, and inorganic compounds: Metallic chromium, as Cr(0). See annual publication for most recent information.
  • EPA: Hazard Summary - Chromium
  • ATSDR: Toxicological Profile for Chromium. 2012.
  • NIOSH: Recommendations for Occupational Safety and Health - Compendium of Policy Documents and Statements. 1992.

Last Updated Date : 12/21/2020