---
title: "Butanethiol (109-79-5): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/butanethiol-109-79-5/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/butanethiol-109-79-5/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/butanethiol-109-79-5/
---

Hazard search

# Butanethiol

CAS number

109-79-5

Also known as

1-Butanethiol · 1-Butanethiol (butyl mercaptan) · 1-Mercaptobutane · n-Butyl mercaptan · n-Butyl mercaptan (mercaptans)

## UK workplace exposure limits

Our data hold no UK limit for this substance.

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 2525** / n-Butyl mercaptan by GC-FPD / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/2525.pdf) | Active (pump) | Chromosorb 104 tube (150/75mg) | GC-FPD |  |
| **NIOSH 2542** / Mercaptans by GC-FPD / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/2542.pdf) | Active (pump) | Coated glass fibre filter in preloaded cassette | GC-FPD | [225-9007](https://analyt-mtc.com/catalog/product/skc-coated-treated-filters/#part-225-9007) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **Non-agency** / Mercaptans by Colorimetric analysis | Direct-reading | Gastec detector tube |  | [810-70L](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-70l) |

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/)