---
title: "Methyl ethyl ketone peroxide (1338-23-4): sampling methods"
url: https://analyt-mtc.com/tools/hazard-search/methyl-ethyl-ketone-peroxide-1338-23-4/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/methyl-ethyl-ketone-peroxide-1338-23-4/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/methyl-ethyl-ketone-peroxide-1338-23-4/
---

Hazard search

# Methyl ethyl ketone peroxide

CAS number

1338-23-4

Also known as

2-Butanone peroxide · Ethyl methyl ketone peroxide · MEK peroxide · MEKP · Methyl ethyl ketone peroxide (MEKP)

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 15-minute STEL | 0.2 ppm |  |
| 15-minute STEL | 1.5 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 3508** / Methyl ethyl ketone peroxide by VIS / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/3508.pdf) | Active (pump) | Midget impinger | VAS | [225-36-1](https://analyt-mtc.com/catalog/product/skc-impingers/#part-225-36-1) / [225-22](https://analyt-mtc.com/catalog/product/biosampler/#part-225-22) |
| **OSHA 77** / Methyl ethyl ketone peroxide by HPLC/UV / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-77.pdf) | Active (pump) | XAD-4 tube (80/40mg) | HPLC-UV | [226-93](https://analyt-mtc.com/catalog/product/skc-xad-sorbent-tubes/#part-226-93) |

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/)