---
title: "Methacrylic acid (79-41-4): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/methacrylic-acid-79-41-4/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/methacrylic-acid-79-41-4/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/methacrylic-acid-79-41-4/
---

Hazard search

# Methacrylic acid

CAS number

79-41-4

Also known as

2-Methylpropenoic acid · α-Methylacrylic acid

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 20 ppm |  |
| 8-hour TWA | 72 mg/m³ |  |
| 15-minute STEL | 40 ppm |  |
| 15-minute STEL | 143 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **OSHA PV2005** | Active (pump) |  | HPLC-UV | [226-30-08](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/#part-226-30-08) |
| **Non-agency** / SKC Partial Validation based on OSHA PV2005 for Acrylic acid & Methacrylic acid by LC -UV | Active (pump) | Two Anasorb 708 tubes in series (100mg) |  | [226-30-08](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/#part-226-30-08) |
| **Non-agency** / Methacrylic 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 60** | Active (pump) |  | HPLC-UV | [226-30-08](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/#part-226-30-08) |

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/)