# Acetone cyanohydrin as CN — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Acetone cyanohydrin as CN, pel (ppm) is 4.7; pel (mg/m³) is 5; ceiling is C, verified against its source on 2026-08-05.

- **Substance:** Acetone cyanohydrin as CN
- **PEL (ppm):** 4.7
- **PEL (mg/m³):** 5
- **Ceiling:** C

## What the source says

> 75865 | | Acetone cyanohydrin as CN | 4.7 | 5 | C

## 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/).