---
title: "Acetic anhydride (108-24-7): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/acetic-anhydride-108-24-7/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/acetic-anhydride-108-24-7/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/acetic-anhydride-108-24-7/
---

Hazard search

# Acetic anhydride

CAS number

108-24-7

Also known as

Acetic acid anhydride · Acetic oxide · Acetyl acetate · Acetyl oxide · Ethanoic anhydride · Ethanoyl ethanoate

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 0.5 ppm |  |
| 8-hour TWA | 2.5 mg/m³ |  |
| 15-minute STEL | 2 ppm |  |
| 15-minute STEL | 10 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 3506** / Acetic anhydride by VIS / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/3506.pdf) | Active (pump) | Fritted midget impinger | VAS | [225-36-2](https://analyt-mtc.com/catalog/product/skc-impingers/#part-225-36-2) / [225-22](https://analyt-mtc.com/catalog/product/biosampler/#part-225-22) |
| **OSHA 102** / Acetic anhydride by GC-NPD / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-102.pdf) | Active (pump) | Coated glass fibre filter in cassette | GC-NPD | [225-9010](https://analyt-mtc.com/catalog/product/skc-coated-treated-filters/#part-225-9010) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **Non-agency** / Acetic anhydride by Colorimetric analysis | Direct-reading | Gastec detector tube |  | [810-81](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-81) / [810-81L](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-81l) |
| **Non-agency** / Acetic anhydride by Colorimetric analysis | Passive | Gastec Dosi-tube |  | [810-81D](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-81d) |
| **Other** | Passive |  | DR | [810-81D](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-81d) |

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/)