---
type: threshold
id: hexachlorobutadiene
asset: workplace-exposure-limits
title: "Hexachlorobutadiene — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "87683 | S | Hexachlorobutadiene | 0.02 | 0.24"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Hexachlorobutadiene"
pel_ppm: "0.02"
pel_mgm3: "0.24"
verified: true
---
**Substance:** Hexachlorobutadiene

**PEL (ppm):** 0.02

**PEL (mg/m³):** 0.24

> 87683 | S | Hexachlorobutadiene | 0.02 | 0.24

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