Hydroquinone — CAS 123-31-9 — workplace exposure limit
What is the pel (mg/m³) for Hydroquinone — CAS 123-31-9 — workplace exposure limit?
For Hydroquinone, pel (mg/m³) is 2; cas no. is 123-31-9, verified against its source on 2026-08-05.
Hydroquinone | 123-31-9 | - | 2 | - |
— osha.gov, retrieved 2026-08-05
- Substance
- Hydroquinone verified
- CAS No.
- 123-31-9 verified
- PEL (mg/m³)
- 2 verified
- NIOSH REL (mg/m³)
- C 2 per cdc.gov
What dir.ca.gov says
123319 | | Hydroquinone; 1,4-benezendiol | -- | 2
— dir.ca.gov, retrieved 2026-08-05
What cdc.gov says
NIOSH REL C 2 mg/m3 [15-minute]
— cdc.gov, retrieved 2026-09-08
Substance
CDC - NIOSH Pocket Guide to Chemical Hazards - Hydroquinone
CAS No.
CAS No. 123-31-9
What dir.ca.gov says
123319 | | p-Dihydroxybenzene; see Hydroquinone
— dir.ca.gov, retrieved 2026-08-05
Sources
- osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- dir.ca.govhttps://www.dir.ca.gov/title8/5155.html
- cdc.govhttps://www.cdc.gov/niosh/npg/npgd0338.html