Hazard search
Sulphur dioxide
- CAS number
- 7446-09-5
- Also known as
- SO2 · Sulphur oxide · Sulphurous anhydride · Sulphurous oxide
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 8-hour TWA | 0.5 ppm | |
| 8-hour TWA | 1.3 mg/m³ | |
| 15-minute STEL | 1 ppm | |
| 15-minute STEL | 2.7 mg/m³ |
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| NIOSH 6004 Sulphur dioxide by IC Method document (opens in a new tab) | Active (pump) | Coated MCE filter in cassette | IC | 225-9005 225-1 |
| OSHA 1011 Sulphur dioxide by IC Method document (opens in a new tab) | Active (pump) | Coated silica gel tube with glass fibre filter | IC | 226-177 |
| Non-agency Hydrogen sulphide + sulphur dioxide by Colorimetric analysis | Direct-reading | Gastec Detector Tube | 810-45H | |
| Non-agency Sulphur dioxide by Colorimetric analysis | Direct-reading | Gastec detector tube | 810-5 810-45S 810-80 | |
| Non-agency Sulphur dioxide by Colorimetric analysis | Passive | Gastec Dosi-tube | 810-5D 810-5DH | |
| Non-agency Sulphur dioxide by IC | Passive | UMEx 200 Passive Sampler | 500-200 | |
| Other | Passive | IC | 500-200 | |
| Other | Passive | DR | 810-5D 810-5DH |
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)