# Dioxane (Diethylene dioxide) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Dioxane (Diethylene dioxide), cas no. is 123-91-1; pel (ppm) is 100; pel (mg/m³) is 360, verified against its source on 2026-08-05.

- **Substance:** Dioxane (Diethylene dioxide)
- **CAS No.:** 123-91-1
- **PEL (ppm):** 100
- **PEL (mg/m³):** 360

## What the source says

> Dioxane (Diethylene dioxide) | 123-91-1 | 100 | 360 | X |

## Source

- https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1

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/).