TERT-BUTYL CHROMATE‡

Chemical Identification
Chemical Identification
CAS # 1189-85-1
Formula

C₈H₁₈CrO₄

Synonyms

di-tert-butyl ester of chromic acid

Physical Properties
Physical Properties
Physical description Liquid.
Boiling point Molecular weight 230.3
Freezing point/melting point 23-32°F 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
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)

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 REL-TWA

0.001 mg/m³

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

0.1 mg/m³ (as CrO₃) [1960]

PEL-C

0.1 mg/m³ (as CrO₃), 0.005 mg/m³ (as Cr)

Skin notation

Y

Skin notation

N

Skin notation

Y

Skin notation

Y

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 CHROMIUM VI COMPOUNDS (HEXAVALENT CHROMIUM).

Notes:

CARCINOGEN (Ca) as Cr(VI): See Appendix A, NIOSH Potential Occupational Carcinogens. See also 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:

See Sections 1532.2, 5206 & 8359.

Health factors:  See NIH-NLM PubChem. IDLH

15 mg/m³

Carcinogenic classifications: NIOSH-Ca 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 - T-Butyl chromate

NIOSH: Pocket Guide to Chemical Hazards - tert-Butyl chromate

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - tert-Butyl chromate, as CrO₃. See annual publication for most recent information.

Last Updated Date : 01/12/2021