---
type: threshold
id: heptachlor-1-4-5-6-7-8-8-hepta-chloro-3a-4-7-7a-tetrahydro-4-7-methanoindene
asset: workplace-exposure-limits
title: "Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a-tetrahydro-4,7-methanoindene — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "76448 | S | Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a-tetrahydro-4,7-methanoindene | -- | 0.05"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a-tetrahydro-4,7-methanoindene"
pel_mgm3: "0.05"
verified: true
---
**Substance:** Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a-tetrahydro-4,7-methanoindene

**PEL (mg/m³):** 0.05

> 76448 | S | Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a-tetrahydro-4,7-methanoindene | -- | 0.05

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