Hazard search
Phosphoric acid
- CAS number
- 7664-38-2
- Also known as
- o-Phosphoric acid · Orthophosphoric acid
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 8-hour TWA | 1 mg/m³ | |
| 15-minute STEL | 2 mg/m³ |
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| NIOSH 7903 | Active (pump) | IC | 226-10-03 | |
| NIOSH 7908 Non-Volatile Acids by IC Method document (opens in a new tab) | Active (pump) | Quartz filter | IC-CD | 225-9033 225-1 |
| OSHA ID 111 | Active (pump) | IC | 225-3-01 225-1 | |
| OSHA ID 165SG | Active (pump) | IC | 226-10-03 | |
| OSHA ID-111 Phosphoric acid by IC Method document (opens in a new tab) | Active (pump) | 0.8µm MCE filter in 37mm cassette | 225-3-01 225-1 | |
| OSHA ID-165SG Acid mists by IC Method document (opens in a new tab) | Active (pump) | Silica gel tube (400/200mg) | 226-10-03 |
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)