---
title: "Caesium hydroxide (21351-79-1): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/caesium-hydroxide-21351-79-1/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/caesium-hydroxide-21351-79-1/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/caesium-hydroxide-21351-79-1/
---

Hazard search

# Caesium hydroxide

CAS number

21351-79-1

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 2 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 91/2** | Active (pump) |  | XRF | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |

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/)