Hazard search
Sodium hydroxide
- CAS number
- 1310-73-2
- Also known as
- Caustic soda · Soda lye · Sodium hydrate · Sodium hydroxide (alkaline dust)
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 15-minute STEL | 2 mg/m³ |
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| MDHS 14/4 General inhalable or respirable dusts by gravimetric analysis Method document (opens in a new tab) | Active (pump) | IOM with GF filter | GR | 225-70A 225-58F |
| NIOSH 7401 Alkali dusts by Acid-base titration Method document (opens in a new tab) | Active (pump) | 1µm PTFE filter in cassette | TITRA | 225-17-01 225-3LF 225-1 225-1715 |
| OSHA ID 121 | Active (pump) | AA or AES | 225-3-01 225-1 | |
| OSHA ID-121 Metal & metalloid particulates by AAS Method document (opens in a new tab) | Active (pump) | 0.8µm MCE filter in preloaded cassette | 225-3-01 225-1 |
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)