Hazard search
Dichlorofluoromethane
- CAS number
- 75-43-4
- Also known as
- Dichloromonofluoromethane · Dichloromonofluoromethane (dichlorofluoromethane) · Fluorodichloromethane · Freon 21 · HCFC 21
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 8-hour TWA | 10 ppm | |
| 8-hour TWA | 43 mg/m³ |
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| MDHS 96 | Active (pump) | GC-FID | 226-01 | |
| MDHS 96 VOCs by solvent desorption and GC Method document (opens in a new tab) | Active (pump) | Two charcoal tubes in series (front 400mg, rear 200mg) | 226-25 | |
| NIOSH 1018 Dichlorodifluoromethane by GC-FID Method document (opens in a new tab) | Active (pump) | Two charcoal tubes in series (front 400/200mg, back 100/50mg) | 226-09 226-01 | |
| NIOSH 2516 Dichlorofluoromethane by GC-FID Method document (opens in a new tab) | Active (pump) | Two charcoal tubes in series (front 400mg, back 200mg) | GC-FID | 226-25 |
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)