Ethyl mercaptan — workplace exposure limit
What is the pel (ppm) for Ethyl mercaptan — workplace exposure limit?
For Ethyl mercaptan, pel (ppm) is (C)10; pel (mg/m³) is (C)25; cas no. is 75-08-1, verified against its source on 2026-08-05.
Ethyl mercaptan | 75-08-1 | (C)10 | (C)25 | - |
— osha.gov, retrieved 2026-08-05
(C)10
The most of this substance workplace air may legally contain, averaged over an 8-hour shift — OSHA's permissible exposure limit (PEL), in parts per million, from the agency's own table row quoted below. Where federal OSHA and Cal/OSHA disagree, both limits are stated, each with its own agency's table row as evidence. NIOSH's number, where there is one, is shown separately: it is a recommended limit, not a legal one, and it is often the strictest of the three.
- Substance
- Ethyl mercaptan verified
- CAS No.
- 75-08-1 verified
- PEL (ppm)
- (C)10 verified
- PEL (mg/m³)
- (C)25 verified
- NIOSH REL (ppm)
- C 0.5 per cdc.gov
- NIOSH REL (mg/m³)
- 1.3 per cdc.gov
What cdc.gov says
NIOSH REL C 0.5 ppm (1.3 mg/m3) [15-minute]
— cdc.gov, retrieved 2026-09-08