# 1,3-Butadiene (see also section 5201) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For 1,3-Butadiene (see also section 5201), pel (ppm) is 1; pel (mg/m³) is 2.2; stel (ppm) is 5; stel (mg/m³) is 11, verified against its source on 2026-08-05.

- **Substance:** 1,3-Butadiene (see also section 5201)
- **PEL (ppm):** 1
- **PEL (mg/m³):** 2.2
- **STEL (ppm):** 5
- **STEL (mg/m³):** 11

## What the source says

> 106990 | | 1,3-Butadiene (see also section 5201) | 1 | 2.2 | | 5 | 11

## Source

- 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/).