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) | Active (pump) | Coated silica gel tube (200/100mg) with prefilter | VAS | 226-10-06 225-3-01 |
| NIOSH 6016 Ammonia by IC Method document (opens in a new tab) | Active (pump) | Coated silica gel tube (200/100mg) with prefilter | IC | 226-10-06 225-3-01 |
| OSHA ID 188 | Active (pump) | IC-CD | 226-29 | |
| OSHA ID-164 Ammonia by ISE Method document (opens in a new tab) | Active (pump) | Fritted midget impinger | 225-36-2 225-22 | |
| OSHA ID-188 Ammonia by IC Method document (opens in a new tab) | Active (pump) | Treated Anasorb 747 tube (500/250mg) | 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 810-3DL | |
| Non-agency Ammonia by IC | Passive | UMEx 300 passive sampler | 500-300 | |
| Non-agency 41 | CLR | |||
| Other | Passive | IC/CD | 500-300 | |
| Other | Passive | DR | 810-3D | |
| Other | Passive | DR | 810-3DL |
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); SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)