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

For beta-Chloroprene, cas no. is 126-99-8; pel (ppm) is 25; pel (mg/m³) is 90, verified against its source on 2026-08-05.

- **Substance:** beta-Chloroprene
- **CAS No.:** 126-99-8
- **PEL (ppm):** 25
- **PEL (mg/m³):** 90

## What the source says

> beta-Chloroprene | 126-99-8 | 25 | 90 | 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/).