---
title: "Propanoic acid (79-09-4): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/propanoic-acid-79-09-4/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/propanoic-acid-79-09-4/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/propanoic-acid-79-09-4/
---

Hazard search

# Propanoic acid

CAS number

79-09-4

Also known as

Carboxyethane · Ethanecarboxylic acid · Ethylformic acid · Metacetonic acid · Methyl acetic acid · Propionic acid · Propionic acid (see online Passive Sampling Guide)

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 10 ppm |  |
| 8-hour TWA | 31 mg/m³ |  |
| 15-minute STEL | 15 ppm |  |
| 15-minute STEL | 46 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **OSHA CSI** | Active (pump) |  | GC-FID | [226-15](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-15) |
| **OSHA PV2293** / Propionic acid by gas chromatography (GC) with a flame ionization detector (FID) / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-pv2293.pdf) | Active (pump) | Sorbent Tube | IC | [226-15](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-15) |
| **Non-agency** / Propionic acid by Colorimetric analysis | Direct-reading | Gastec detector tube |  | [810-81](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-81) / [810-81L](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-81l) |
| **Non-agency** / VOCs by solvent desorption and GC-FID / [Method document (opens in a new tab)](https://www.skcltd.com/images/pdfs/VOC_Chek_575_Series-Selection_Guide.pdf) | Passive | Passive sampler |  | [575-001](https://analyt-mtc.com/catalog/product/skc-organic-vapour-passive-samplers/#part-575-001) / [575-002](https://analyt-mtc.com/catalog/product/skc-organic-vapour-passive-samplers/#part-575-002) |
| **Non-agency** / Propionic acid by GC-FID | Passive | Passive sampler |  | 575-003 |
| **Other** | Passive |  |  | [575-001](https://analyt-mtc.com/catalog/product/skc-organic-vapour-passive-samplers/#part-575-001) |

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/)