# Dinitrobenzene (all (isomers) ortho, meta and para isomers — CAS 528290, 99650, 100254 — workplace exposure limit

For Dinitrobenzene (all (isomers) ortho, meta and para isomers, pel (ppm) is 0.15; pel (mg/m³) is 1; cas no. is 528290, 99650, 100254, verified against its source on 2026-09-29.

- **Substance:** Dinitrobenzene (all (isomers) ortho, meta and para isomers _(verified: appears in the quote below)_
- **CAS No.:** 528290, 99650, 100254 _(verified: appears in the quote below)_
- **PEL (ppm):** 0.15 _(verified: appears in the quote below)_
- **PEL (mg/m³):** 1 _(verified: appears in the quote below)_

## What the source says

> 528290, 99650, 100254 | S | Dinitrobenzene (all (isomers) ortho, meta and para isomers | 0.15 | 1

## Source

- https://www.dir.ca.gov/title8/5155.html

Last verified: 2026-09-29. Review by: 2027-09-29.
Part of [US workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side](https://referencesource.org/workplace-exposure-limits/).