3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209 — CAS 91941 — workplace exposure limit

What is the cas no. for 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209 — workplace exposure limit?

For 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209, cas no. is 91941, verified against its source on 2026-09-29.

91941 | S | 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209

— dir.ca.gov, retrieved 2026-08-05

Substance: 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209 verified
CAS No.: 91941 verified
NIOSH REL, as stated: Ca See Appendix A per cdc.gov

Verified2026-09-29

Review by2027-08-05

NIOSH REL Ca See Appendix A

— cdc.gov, retrieved 2026-09-08

Substance

CDC - NIOSH Pocket Guide to Chemical Hazards - 3,3'-Dichlorobenzidine (and its salts)

CAS No.

CAS No. 91-94-1

3,′-Dichlorobenzidine; see 1910.1007 | 91-94-1 | - | - | - |

— osha.gov, retrieved 2026-08-05

dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
cdc.govhttps://www.cdc.gov/niosh/npg/npgd0191.html
osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1

Last verified against source: 2026-09-29. Due for re-check by 2027-08-05. This page as Markdown · OKF bundle · full dataset as JSON.