---
type: threshold
id: ethyl-mercaptan-ethanethiol
asset: workplace-exposure-limits
title: "Ethyl mercaptan; ethanethiol — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "75081 | | Ethyl mercaptan; ethanethiol | 0.5 | 1"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Ethyl mercaptan; ethanethiol"
pel_ppm: "0.5"
pel_mgm3: "1"
verified: true
---
**Substance:** Ethyl mercaptan; ethanethiol

**PEL (ppm):** 0.5

**PEL (mg/m³):** 1

> 75081 | | Ethyl mercaptan; ethanethiol | 0.5 | 1

Source: <https://www.dir.ca.gov/title8/5155.html>