LEAD CHROMATE‡

Chemical Identification
Chemical Identification
CAS # 7758-97-6
Formula

PbCrO₄

Synonyms

plumbous chromate; lead chromate (VI)

Physical Properties
Physical Properties
Physical description Yellow or orange-yellow crystals or powder.
Boiling point 482°F (decomposes) Molecular weight 323.2
Freezing point/melting point 1551°F Vapor pressure
Flash point Vapor density
Specific gravity 6.12 at 59°F 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 [CHROMIUM VI COMPOUNDS (HEXAVALENT CHROMIUM)] and/or 1591 [LEAD]
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 VI COMPOUNDS (HEXAVALENT CHROMIUM) and/or LEAD

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
Bulk Method
Bulk Method
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] (as CrVI)

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 (as Cr)

PEL-STEL REL-STEL TLV-STEL

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

PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

OSHA's chromium (VI) standard applies to all occupational exposures to any chromium species with a valence of positive six, regardless of form or compound, including chromates and chromic acid. See 29 CFR 1910.1026, Chromium (VI). See LEAD for information regarding lead exposure.

Notes:

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

Notes:

dermal sensitization (DSEN), respiratory sensitization (RSEN), BEI®

Notes:
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: IARC-2A, NIOSH-Ca, NTP-K, TLV-A1, EPA-A 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 - Lead chromate

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) - Lead chromate. See annual publication for most recent information.

Last Updated Date : 01/04/2021