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

For Cyclopentane, pel (ppm) is 600; pel (mg/m³) is 1,720, verified against its source on 2026-08-05.

- **Substance:** Cyclopentane
- **PEL (ppm):** 600
- **PEL (mg/m³):** 1,720

## What the source says

> 287923 | | Cyclopentane | 600 | 1,720

## 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/).