# Nitric oxide; NO — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Nitric oxide; NO, pel (ppm) is 25; pel (mg/m³) is 30, verified against its source on 2026-08-05.

- **Substance:** Nitric oxide; NO
- **PEL (ppm):** 25
- **PEL (mg/m³):** 30

## What the source says

> 10102439 | | Nitric oxide; NO | 25 | 30

## 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/).