---
title: "Azelaic acid (123-99-9): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/azelaic-acid-123-99-9/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/azelaic-acid-123-99-9/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/azelaic-acid-123-99-9/
---

Hazard search

# Azelaic acid

CAS number

123-99-9

Also known as

Nonanedioic acid

## UK workplace exposure limits

Our data hold no UK limit for this substance.

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 5019** / Azelaic acid by GC-FID / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/5019.pdf) | Active (pump) | 5µm PVC GLA-5000 filter in cassette | GC-FID | [225-803](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-803) / [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/)