Label abbreviations descriptions

TERT-BUTYL CHROMATE‡

Chemical Identification
CAS # 1189-85-1
Formula

C₈H₁₈CrO₄
Synonyms

di-tert-butyl ester of chromic acid

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
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.

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 REL-TWA

0.001 mg/m³

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

Visit the ACGIH TLV site for specific data

 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

Last Updated Date : 04/08/2024