# Methyl chloroform (1,1,1-Trichloroethane) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Methyl chloroform (1,1,1-Trichloroethane), cas no. is 71-55-6; pel (ppm) is 350; pel (mg/m³) is 1900, verified against its source on 2026-08-05.

- **Substance:** Methyl chloroform (1,1,1-Trichloroethane)
- **CAS No.:** 71-55-6
- **PEL (ppm):** 350
- **PEL (mg/m³):** 1900

## What the source says

> Methyl chloroform (1,1,1-Trichloroethane) | 71-55-6 | 350 | 1900 | - |

## 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/).