---
type: threshold
id: ethylidene-norbornene
asset: workplace-exposure-limits
title: "Ethylidene norbornene — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "16219753 | | Ethylidene norbornene | 5 | 25 | C"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Ethylidene norbornene"
pel_ppm: "5"
pel_mgm3: "25"
ceiling: "C"
verified: true
---
**Substance:** Ethylidene norbornene

**PEL (ppm):** 5

**PEL (mg/m³):** 25

**Ceiling:** C

> 16219753 | | Ethylidene norbornene | 5 | 25 | C

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