# Ethyl mercaptan — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Ethyl mercaptan, cas no. is 75-08-1; pel (ppm) is (C)10; pel (mg/m³) is (C)25, verified against its source on 2026-08-05.

- **Substance:** Ethyl mercaptan
- **CAS No.:** 75-08-1
- **PEL (ppm):** (C)10
- **PEL (mg/m³):** (C)25

## What the source says

> Ethyl mercaptan | 75-08-1 | (C)10 | (C)25 | - |

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).