Hazard search
Trimethyl benzene (all isomers and mixed compounds)
- CAS number
- 25551-13-7
- Also known as
- 1,2,3-Trimethylbenzene (see online Passive Sampling Guide) · 1,2,4-Trimethylbenzene · Methylxylene · Trimethylbenzene · Trimethylbenzenes (all isomers or mixtures)
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 8-hour TWA | 25 ppm | |
| 8-hour TWA | 125 mg/m³ |
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| MDHS 72 VOCs by thermal desorption and GC Method document (opens in a new tab) | Active (pump) | Tenax thermal desorption tube (250mg) or Chromosorb 106 TD tube (300mg) | TD, GC | 226-357 226-358 |
| MDHS 80 | Active (pump) | TD, GC | 226-357 | |
| MDHS 88 VOCs by solvent desorption and GC Method document (opens in a new tab) | Passive | Passive sampler | GC-FID | 575-001 575-002 |
| MDHS 104 VOCs by solvent or thermal desorption and GC Method document (opens in a new tab) | Active (pump) | Tenax (250mg) or Chromosorb 106 (300mg) thermal desorption tube | 226-357 226-358 | |
| MDHS 104 VOCs by solvent or thermal desorption and GC Method document (opens in a new tab) | Active (pump) | Tenax TD tube (250mg) | 226-357 | |
| OSHA 5000 Organic Vapour Sampling Group 1 by GC-FID Method document (opens in a new tab) | Active (pump) | Anasorb CSC sorbent tube | 226-01 | |
| OSHA PV2091 Trimethylbenzenes by GC-FID Method document (opens in a new tab) | Active (pump) | Charcoal tube (100/50mg) | 226-01 | |
| EPA TO-17 | Active (pump) | TD, GC | 226-350 226-347 224-26-02 224-26-CPC | |
| EPA TO-17 Toxic Organic Compounds by thermal desorption and GC Method document (opens in a new tab) | Active (pump) | Thermal desorption tube | 226-300 | |
| Other | Passive | 575-001 | ||
| Other Internal | Passive | TD, GC | 690-101 690-103 690-104 | |
| Other Internal | Passive | GC-FID | 690-105 |
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)