# Ethylene oxide; see Section 5220 — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Ethylene oxide; see Section 5220, pel (ppm) is 1; pel (mg/m³) is 2; stel (ppm) is 5, verified against its source on 2026-08-05.

- **Substance:** Ethylene oxide; see Section 5220
- **PEL (ppm):** 1
- **PEL (mg/m³):** 2
- **STEL (ppm):** 5

## What the source says

> 75218 | | Ethylene oxide; see Section 5220 | 1 | 2 | | 5

## 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/).