---
title: "N-Ethylmorpholine (100-74-3): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/n-ethylmorpholine-100-74-3/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/n-ethylmorpholine-100-74-3/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/n-ethylmorpholine-100-74-3/
---

Hazard search

# N-Ethylmorpholine

CAS number

100-74-3

Also known as

4-Ethylmorpholine

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 5 ppm |  |
| 8-hour TWA | 24 mg/m³ |  |
| 15-minute STEL | 20 ppm |  |
| 15-minute STEL | 96 mg/m³ |  |

### Notations

-   Sk: can be absorbed through the skin

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **OSHA CSI** | Active (pump) |  | GC-FID | [226-10](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-10) |
| **Non-agency** / N-Ethyl morpholine by Colorimetric analysis | Direct-reading | Gastec detector tube |  | [810-180](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-180) / [810-180L](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-180l) |

Methods and limits as published by their agencies and summarised by SKC; check the current method and the limit that applies to you before sampling.

Source: [SKC Ltd (UK), Hazard Search, used with SKC's permission (opens in a new tab)](https://www.skcltd.com/hazard-search.html); [SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)](https://international.skcinc.com/sampling-guides/)