---
title: "Ammonia (7664-41-7): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/ammonia-7664-41-7/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/ammonia-7664-41-7/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/ammonia-7664-41-7/
---

Hazard search

# Ammonia

CAS number

7664-41-7

Also known as

Ammonia (by IC) · Ammonia, anhydrous · Ammonium hydroxide (see ammonia) · NH3

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 25 ppm |  |
| 8-hour TWA | 18 mg/m³ |  |
| 15-minute STEL | 35 ppm |  |
| 15-minute STEL | 25 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 6015** / Ammonia by VIS / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/6015REV.pdf) | Active (pump) | Coated silica gel tube (200/100mg) with prefilter | VAS | [226-10-06](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-10-06) / [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) |
| **NIOSH 6016** / Ammonia by IC / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/6016.pdf) | Active (pump) | Coated silica gel tube (200/100mg) with prefilter | IC | [226-10-06](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-10-06) / [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) |
| **OSHA ID 188** | Active (pump) |  | IC-CD | [226-29](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/#part-226-29) |
| **OSHA ID-164** / Ammonia by ISE / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-id164.pdf) | Active (pump) | Fritted midget impinger |  | [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) |
| **OSHA ID-188** / Ammonia by IC / [Method document (opens in a new tab)](http://www.osha.gov/dts/sltc/methods/inorganic/id188/id188.html) | Active (pump) | Treated Anasorb 747 tube (500/250mg) |  | [226-29](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/#part-226-29) |
| **Non-agency** / Ammonia by Colorimetric analysis | Direct-reading | Gastec Detector tube |  | 810-3 |
| **Non-agency** / Ammonia by Colorimetric analysis | Passive | Gastec Dosi-tube |  | [810-3D](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-3d) / [810-3DL](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-3dl) |
| **Non-agency** / Ammonia by IC | Passive | UMEx 300 passive sampler |  | [500-300](https://analyt-mtc.com/catalog/product/skc-umex-300-passive-sampler-ammonia/#part-500-300) |
| **Non-agency 41** |  |  | CLR |  |
| **Other** | Passive |  | IC/CD | [500-300](https://analyt-mtc.com/catalog/product/skc-umex-300-passive-sampler-ammonia/#part-500-300) |
| **Other** | Passive |  | DR | [810-3D](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-3d) |
| **Other** | Passive |  | DR | [810-3DL](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-3dl) |

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/)