---
type: threshold
id: toluene-2-4-diisocyanate-tdi-2
asset: workplace-exposure-limits
title: "Toluene-2,4-diisocyanate; TDI — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "584849 | | Toluene-2,4-diisocyanate; TDI | 0.005 | 0.04 | 0.02 ppm | 0.02 | 0.15"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Toluene-2,4-diisocyanate; TDI"
pel_ppm: "0.005"
pel_mgm3: "0.04"
ceiling: "0.02 ppm"
stel_ppm: "0.02"
stel_mgm3: "0.15"
verified: true
---
**Substance:** Toluene-2,4-diisocyanate; TDI

**PEL (ppm):** 0.005

**PEL (mg/m³):** 0.04

**Ceiling:** 0.02 ppm

**STEL (ppm):** 0.02

**STEL (mg/m³):** 0.15

> 584849 | | Toluene-2,4-diisocyanate; TDI | 0.005 | 0.04 | 0.02 ppm | 0.02 | 0.15

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