---
type: threshold
id: 4-4-methylene-dianiline-mda-see-also-sections-1535-5200
asset: workplace-exposure-limits
title: "4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "101779 | S | 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) | 0.01 | 0.08 | | 0.1 | 0.8"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200)"
pel_ppm: "0.01"
pel_mgm3: "0.08"
stel_ppm: "0.1"
stel_mgm3: "0.8"
verified: true
---
**Substance:** 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200)

**PEL (ppm):** 0.01

**PEL (mg/m³):** 0.08

**STEL (ppm):** 0.1

**STEL (mg/m³):** 0.8

> 101779 | S | 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) | 0.01 | 0.08 | | 0.1 | 0.8

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