---
type: threshold
id: n-ethylmorpholine-4-ethyl-1-4-tetrahydrooxazine
asset: workplace-exposure-limits
title: "N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "100743 | S | N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine | 5 | 23"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine"
pel_ppm: "5"
pel_mgm3: "23"
verified: true
---
**Substance:** N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine

**PEL (ppm):** 5

**PEL (mg/m³):** 23

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

Source: <https://www.dir.ca.gov/title8/5155.html>