---
title: "Sodium cyanide (143-33-9): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/sodium-cyanide-143-33-9/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/sodium-cyanide-143-33-9/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/sodium-cyanide-143-33-9/
---

Hazard search

# Sodium cyanide

CAS number

143-33-9

Also known as

Hydrocyanic acid, sodium salt

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 1 mg/m³ |  |
| 15-minute STEL | 5 mg/m³ |  |

### Notations

-   Sk: can be absorbed through the skin

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 7904** / Cyanides by ISE / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/7904.pdf) | Active (pump) | 1µm PTFE filter with fritted midget impinger |  | 225-2705 / [225-2LF](https://analyt-mtc.com/catalog/product/sureseal-cassette-blanks/#part-225-2lf) / [225-36-2](https://analyt-mtc.com/catalog/product/skc-impingers/#part-225-36-2) / [225-22](https://analyt-mtc.com/catalog/product/biosampler/#part-225-22) |

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)