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

For 2-Aminopyridine, cas no. is 504-29-0; pel (ppm) is 0.5; pel (mg/m³) is 2, verified against its source on 2026-08-05.

- **Substance:** 2-Aminopyridine
- **CAS No.:** 504-29-0
- **PEL (ppm):** 0.5
- **PEL (mg/m³):** 2

## What the source says

> 2-Aminopyridine | 504-29-0 | 0.5 | 2 | - |

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
- https://www.dir.ca.gov/title8/5155.html

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/).