---
type: threshold
id: hexachlorocyclopentadiene
asset: workplace-exposure-limits
title: "Hexachlorocyclopentadiene — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "77474 | | Hexachlorocyclopentadiene | 0.01 | 0.11"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Hexachlorocyclopentadiene"
pel_ppm: "0.01"
pel_mgm3: "0.11"
verified: true
---
**Substance:** Hexachlorocyclopentadiene

**PEL (ppm):** 0.01

**PEL (mg/m³):** 0.11

> 77474 | | Hexachlorocyclopentadiene | 0.01 | 0.11

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