---
title: "Methylarsonic acid (124-58-3): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/methylarsonic-acid-124-58-3/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/methylarsonic-acid-124-58-3/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/methylarsonic-acid-124-58-3/
---

Hazard search

# Methylarsonic acid

CAS number

124-58-3

Also known as

Methanearsonic acid · Methyl arsonic acid (arsenic, organo-) · Monomethylarsonic acid

## UK workplace exposure limits

Our data hold no UK limit for this substance.

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 5022** / organo-Arsenic by IC / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/5022.pdf) | Active (pump) | 1µm PTFE filter | IC-AA | [225-17-01](https://analyt-mtc.com/catalog/product/ptfe-polytetrafluoroethylene-filters/#part-225-17-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) / [225-2LF](https://analyt-mtc.com/catalog/product/sureseal-cassette-blanks/#part-225-2lf) |

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/)