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

For Trimethylamine, pel (ppm) is 5; pel (mg/m³) is 12; stel (ppm) is 15; stel (mg/m³) is 36, verified against its source on 2026-08-05.

- **Substance:** Trimethylamine
- **PEL (ppm):** 5
- **PEL (mg/m³):** 12
- **STEL (ppm):** 15
- **STEL (mg/m³):** 36

## What the source says

> 75503 | | Trimethylamine | 5 | 12 | | 15 | 36

## 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/).