# o-Toluidine — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For o-Toluidine, cas no. is 95-53-4; pel (ppm) is 5; pel (mg/m³) is 22, verified against its source on 2026-08-05.

- **Substance:** o-Toluidine
- **CAS No.:** 95-53-4
- **PEL (ppm):** 5
- **PEL (mg/m³):** 22

## What the source says

> o-Toluidine | 95-53-4 | 5 | 22 | X |

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).