# Cyanide, as CN — workplace exposure limit

For Cyanide, as CN, pel (mg/m³) is 5, verified against its source on 2026-09-29.

- **Substance:** Cyanide, as CN _(verified: appears in the quote below)_
- **PEL (mg/m³):** 5 _(verified: appears in the quote below)_

## What the source says

> S | Cyanide, as CN | -- | 5

## Source

- https://www.dir.ca.gov/title8/5155.html

Last verified: 2026-09-29. Review by: 2027-09-29.
Part of [US workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side](https://referencesource.org/workplace-exposure-limits/).