# Chloroform (Trichloromethane) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Chloroform (Trichloromethane), cas no. is 67-66-3; pel (ppm) is (C)50; pel (mg/m³) is (C)240, verified against its source on 2026-08-05.

- **Substance:** Chloroform (Trichloromethane)
- **CAS No.:** 67-66-3
- **PEL (ppm):** (C)50
- **PEL (mg/m³):** (C)240

## What the source says

> Chloroform (Trichloromethane) | 67-66-3 | (C)50 | (C)240 | - |

## 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/).