---
title: "Arsenic trioxide (1327-53-3): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/arsenic-trioxide-1327-53-3/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/arsenic-trioxide-1327-53-3/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/arsenic-trioxide-1327-53-3/
---

Hazard search

# Arsenic trioxide

CAS number

1327-53-3

Also known as

Arsenic trioxide as AS · Arsenic(III) oxide · Arsenous acid anhydride · Arsenous oxide · White arsenic

## UK workplace exposure limits

Our data hold no UK limit for this substance.

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 7901** / Arsenic trioxide by AAS / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/7901.pdf) | Active (pump) | 0.8µm MCE filter | AAS-GF | [225-5](https://analyt-mtc.com/catalog/product/disposable-parallel-particle-impactors/#part-225-5) / [225-2LF](https://analyt-mtc.com/catalog/product/sureseal-cassette-blanks/#part-225-2lf) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |

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/)