Hazard search
Hydroquinone
- CAS number
- 123-31-9
- Also known as
- 1,4-Dihydroxybenzene · Hydroquinol · p-Dihydroxybenzene · para-Dihydroxybenzene · Quinol
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 8-hour TWA | 0.5 mg/m³ |
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| MDHS 98/2 Hydroquinone by HPLC Method document (opens in a new tab) | Active (pump) | IOM with glass fibre filter and Tenax tube (100/50mg) | HPLC-UV | 225-70A 225-58F 225-35-03 226-35-03 |
| NIOSH 5004 Hydroquinone by HPLC/UV Method document (opens in a new tab) | Active (pump) | 0.8µm MCE filter in cassette | HPLC-UV | 225-3-01 225-1 |
| OSHA PV2094 Hydroquinone by LC -UV Method document (opens in a new tab) | Active (pump) | Coated XAD-7 tube (80/40mg) | HPLC-UV | 226-98 |
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)