---
type: threshold
id: isophorone-diisocyanate-ipdi
asset: workplace-exposure-limits
title: "Isophorone diisocyanate; IPDI — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "4098719 | S | Isophorone diisocyanate; IPDI | 0.005 | 0.045 | | 0.02 | --"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Isophorone diisocyanate; IPDI"
pel_ppm: "0.005"
pel_mgm3: "0.045"
stel_ppm: "0.02"
verified: true
---
**Substance:** Isophorone diisocyanate; IPDI

**PEL (ppm):** 0.005

**PEL (mg/m³):** 0.045

**STEL (ppm):** 0.02

> 4098719 | S | Isophorone diisocyanate; IPDI | 0.005 | 0.045 | | 0.02 | --

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