---
title: "o-Phthalaldehyde (643-79-8): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/o-phthalaldehyde-643-79-8/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/o-phthalaldehyde-643-79-8/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/o-phthalaldehyde-643-79-8/
---

Hazard search

# o-Phthalaldehyde

CAS number

643-79-8

Also known as

1,2-Benzenedicarboxaldehyde · 2-Formylbenzaldehyde · Phthalaldehyde · Phthalic aldehyde

## UK workplace exposure limits

Our data hold no UK limit for this substance.

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 102** / Aldehydes by HPLC / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs102.pdf) | Passive | UMEx 100 Passive Sampler |  | [500-100](https://analyt-mtc.com/catalog/product/skc-umex-100-passive-sampler-for-formaldehyde/#part-500-100) |

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)