---
type: threshold
id: m-xylene-a-a-diamine
asset: workplace-exposure-limits
title: "m-Xylene-a,a′-diamine — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "1477550 | S | m-Xylene-a,a′-diamine | -- | 0.1 | C"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "m-Xylene-a,a′-diamine"
pel_mgm3: "0.1"
ceiling: "C"
verified: true
---
**Substance:** m-Xylene-a,a′-diamine

**PEL (mg/m³):** 0.1

**Ceiling:** C

> 1477550 | S | m-Xylene-a,a′-diamine | -- | 0.1 | C

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