CHROMIUM VI COMPOUNDS (HEXAVALENT CHROMIUM)‡

Chemical Identification
Chemical Identification
CAS # 18540-29-9 (Cr VI); 7440-47-3 (Cr)
Formula

Cr(VI)

Synonyms

chrome 6; chromium (VI); chromic acid; chromium oxide

Physical Properties
Physical Properties
Physical description Very hard gray solid with a metallic luster.
Boiling point Molecular weight
Freezing point/melting point Vapor pressure
Flash point Vapor density
Specific gravity 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.) 0689 0689 - WIPE
Sampling group
Sampler/Sampling media Hexavalent Chromium Filters and Cassette (37mm PVC) For Welding and Painting Operations [SLTC104] Hexavalent Chromium Filters (For Wipe Samples Only) [SLTC107]
Sampling time*

480 min

Sampling volume (TWA)*

960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments IC IC-UV
Method reference OSHA ID-215v.2 (fully validated) OSHA W4001 (fully validated)
Notes

All samples taken for CHROMIUM VI COMPOUNDS should be shipped to the OSHA SLTC within 24 hours after sampling by overnight delivery for stabilization and analysis.

Chromium plating samples collected on PVC filters must be shipped to the OSHA SLTC within 24 hours of sampling by overnight delivery. These samples must be stabilized by laboratory personnel as described in Section 2 of OSHA ID-215 (version 2).

OSHA CSHOs should obtain low-background PVC filters and quartz fiber filters coated with sodium hydroxide from the SLTC to sample hexavalent chromium.

Media: Hexavalent Chromium Filters and Cassettes (37 mm PVC) [SLTC104]; (25 mm PVC) [SLTC105]; (37 mm Quartz Fiber Filter coated with 1% NaOH) [SLTC106] **Use Quartz Filter for Plating

All samples taken for CHROMIUM VI COMPOUNDS should be shipped to the OSHA SLTC within 24 hours after sampling by overnight delivery for stabilization and analysis.

Chromium plating samples collected on PVC filters must be shipped to the OSHA SLTC within 24 hours of sampling by overnight delivery. These samples must be stabilized by laboratory personnel as described in Section 2 of OSHA ID-215 (version 2).

OSHA CSHOs should obtain low-background PVC filters and quartz fiber filters coated with sodium hydroxide from the SLTC to sample hexavalent chromium.

Media: Hexavalent Chromium Filters and Cassettes (37 mm PVC) [SLTC104]; (25 mm PVC) [SLTC105]; (37 mm Quartz Fiber Filter coated with 1% NaOH) [SLTC106] **Use Quartz Filter for Plating

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.

Wipe Method
Wipe Method
Sampler/Sampling media

See the "Monitoring Methods Used by OSHA" section above for details.

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

5 µg/m³ [2.5 µg/m³ Action Level]

REL-TWA

0.0002 mg/m³ (8 hr TWA)

TLV-TWA

0.0002 mg/m³ (inhalable particulate matter) [2017]

PEL-TWA

0.005 mg/m³

PEL-STEL REL-STEL TLV-STEL

0.0005 mg/m³ (inhalable particulate matter) [2017]

PEL-STEL
PEL-C REL-C TLV-C PEL-C

0.1 mg/m³

Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

OSHA's Chromium (VI) standard applies to occupational exposures to any chromium species with a valence of positive six, regardless of form or compound. See 29 CFR 1910.1026 Chromium (VI). See 29 CFR 1910.1000 Table Z-1 and/or 29 CFR 1910.1000 Table Z-2for any operations or sectors where the exposure limits in §1910.1026 are stayed or otherwise not in effect.

Notes:

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens and Appendix C, Supplementary Exposure Limits.

Notes:

Skin, dermal sensitization (DSEN) and respiratory sensitization (RSEN) (for water-soluble compounds)

Notes:

See Sections 1532.2, 5206 & 8359.

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: EPA-A; K; D; CBD, IARC-1, NIOSH-Ca, NTP-K, TLV-A1 Notes:

Ca

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 - Chromic acid and chromates

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Chromium and inorganic compounds: Hexavalent chromium compounds, as Cr(VI), and water-soluble compounds. See annual publication for most recent information.
  • ATSDR: Toxicological profile for chromium. September 2012.
  • Balachandar V, Arun M, Mohana Devi S, Velmurugan P, Manikantan P, Karthick Kumar A, Sasikala K, Venkatesan C. Evaluation of the genetic alterations in direct and indirect exposures of hexavalent chromium [Cr(VI)] in leather tanning industry workers North Arcot District, South India. Int Arch Occup Environ Health. 83(7):791-801, 2010.
  • NIOSH: Criteria for a Recommended Standard - Occupational Exposure to Chromium (VI).
  • NIOSH: Draft Criteria Document Update - Occupational Exposure to Hexavalent Chromium. September 2008.
  • Zhang XH, Zhang X, Wang XC, Jin LF, Yang ZP, Jiang CX, Chen Q, Ren XB, Cao JZ, Wang Q, Zhu YM. Chronic occupational exposure to hexavalent chromium causes DNA damage in electroplating workers. BMC Public Health. 11:224. 2011.

Last Updated Date : 12/21/2020