---
title: "Trimellitic anhydride (552-30-7): sampling methods"
url: https://analyt-mtc.com/tools/hazard-search/trimellitic-anhydride-552-30-7/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/trimellitic-anhydride-552-30-7/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/trimellitic-anhydride-552-30-7/
---

Hazard search

# Trimellitic anhydride

CAS number

552-30-7

Also known as

1,2,4-Benzenetricarboxylic anhydride · Trimellitic anhydride (TMA)

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 0.04 mg/m³ |  |
| 15-minute STEL | 0.12 mg/m³ |  |

### Notations

-   Sen: can cause sensitisation

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 62** / Aromatic carboxylic acid anhydrides by HPLC / [Method document (opens in a new tab)](http://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs62.pdf) | Active (pump) | 25mm Glass fibre filter with Tenax tube (30/15mg) | HPLC | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-58F](https://analyt-mtc.com/catalog/product/glass-fibre-depth-filters/#part-225-58f) / [226-35](https://analyt-mtc.com/catalog/product/skc-tenax-sorbent-tubes/#part-226-35) |
| **NIOSH 5036** / Trimellitic anhydride by GC-FID / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/5036.pdf) | Active (pump) | 0.8µm PVC-copolymer filter | GC-FID | [225-802](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-802) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **OSHA 98** / Trimellitic anhydride by HPLC/UV / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-98.pdf) | Active (pump) | Coated glass fibre filters in cassette | HPLC-UV | [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) |

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/)