# N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine, pel (ppm) is 5; pel (mg/m³) is 23, verified against its source on 2026-08-05.

- **Substance:** N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine
- **PEL (ppm):** 5
- **PEL (mg/m³):** 23

## What the source says

> 100743 | S | N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine | 5 | 23

## 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/).