---
title: "Methyl isocyanate (624-83-9): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/methyl-isocyanate-624-83-9/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/methyl-isocyanate-624-83-9/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/methyl-isocyanate-624-83-9/
---

Hazard search

# Methyl isocyanate

CAS number

624-83-9

Also known as

Isocyanatomethane · Methyl isocyanate (MIC) · MIC (methyl isocyanate)

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 15-minute STEL | 0.02 ppm |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **OSHA 54** / Methyl isocyanate by HPLC/UV / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-54.pdf) | Active (pump) | Coated XAD-7 tube (80/40mg) | HPLC-FD |  |

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/)