---
title: "Pyrocatechol (120-80-9): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/pyrocatechol-120-80-9/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/pyrocatechol-120-80-9/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/pyrocatechol-120-80-9/
---

Hazard search

# Pyrocatechol

CAS number

120-80-9

Also known as

1,2-Benzenediol · 1,2-Dihydroxybenzene · Catechol · Catechol (pyrocatechol) · o-Benzenediol · o-Dihydroxybenzene · o-Dioxybenzene · o-Hydroquinone · o-hydroxyphenol · o-Phenylenediol

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 5 ppm |  |
| 8-hour TWA | 23 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 104** / VOCs by thermal desorption and GC / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs104.pdf) | Active (pump) | OVS-XAD-7 Tube |  | [226-57](https://analyt-mtc.com/catalog/product/skc-osha-versatile-sampler-ovs-tubes/#part-226-57) |
| **OSHA PV2014** / Catechol by GC-FID / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-pv2014.pdf) | Active (pump) | OVS-7 tube | HPLC-UV | [226-57](https://analyt-mtc.com/catalog/product/skc-osha-versatile-sampler-ovs-tubes/#part-226-57) |

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/)