tert-Butyl chromate — workplace exposure limit

What is the niosh rel, as stated for tert-Butyl chromate — workplace exposure limit?

For tert-Butyl chromate, niosh rel, as stated is Ca TWA 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C; cas no. is 1189-85-1, verified against its source on 2026-09-08.

NIOSH REL Ca TWA 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C

— cdc.gov, retrieved 2026-09-08

Substance: tert-Butyl chromate verified
CAS No.: 1189-85-1 verified
NIOSH REL, as stated: Ca TWA 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C verified
PEL (mg/m³): 0.1 per dir.ca.gov
Ceiling: C per dir.ca.gov

Sourcecdc.gov

Verified2026-09-08

Review by2027-08-05

DatasetUS workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side

Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

Substance

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

CAS No.

CAS No. 1189-85-1

— all from cdc.gov, retrieved 2026-09-08

What osha.gov says

tert-Butyl chromate (as CrO3); see 1910.10266 | 1189-85-1 | - | - | - |

— osha.gov, retrieved 2026-08-05

What dir.ca.gov says

1189851 | S | tert-Butyl chromate; di-tert-butyl Chromate, as CrO$3 | -- | 0.1 | C

— dir.ca.gov, retrieved 2026-08-05

Sources

cdc.govhttps://www.cdc.gov/niosh/npg/npgd0080.html
osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.govhttps://www.dir.ca.gov/title8/5155.html

Last verified against source: 2026-09-08. Due for re-check by 2027-08-05. This page as Markdown · OKF bundle · full dataset as JSON.

What is the OSHA exposure limit for this substance?Find the exposure limit for a substance in workplace air — federal OSHA, California and NIOSH, side by side.