---
type: threshold
id: perchloromethyl-mercaptan-trichloromethanethiol
asset: workplace-exposure-limits
title: "Perchloromethyl mercaptan; trichloromethanethiol — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "594423 | | Perchloromethyl mercaptan; trichloromethanethiol | 0.1 | 0.8"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Perchloromethyl mercaptan; trichloromethanethiol"
pel_ppm: "0.1"
pel_mgm3: "0.8"
verified: true
---
**Substance:** Perchloromethyl mercaptan; trichloromethanethiol

**PEL (ppm):** 0.1

**PEL (mg/m³):** 0.8

> 594423 | | Perchloromethyl mercaptan; trichloromethanethiol | 0.1 | 0.8

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