Isobutan
| Isobutan | ||
|---|---|---|
| ||
| ||
| Generelt | ||
| Systematisk navn | 2-Metylpropan | |
| Andre navne | Trimetylmetan | |
| Molekylformel | C4H10 | |
| Molarmasse | 58,1222 g/mol | |
| Fremtræden | Farveløs gas | |
| CAS-nummer | ||
| SMILES | CC(C)C | |
| Kemiske egenskaber | ||
| Massefylde | 2,5 × 10-3 g/cm³ | |
| Opløselighed i vand | 49 × 10-3 g/l | |
| Smeltepunkt | -159,5 °C | |
| Kogepunkt | -11,7 °C | |
| Sikkerhed | ||
| Største risici |  Meget brandfarlig | |
| NFPA 704 |    | |
| Hvis ikke andet er angivet, er data givet for stoffer i standardtilstanden (ved 25 °C, 100 kPa) | ||
Isobutan eller 2-metylpropan er det enkleste tertiære alkan og har formlen C4H10.
Fremstilling
Isobutan fremstilles gennem isomerisering af naturgas eller flydende petroleumsgas.
Anvendelse
Isobutan kan indgå i flydende petroleumsgas og anvendes som brændsel i cigaretlightere sammen med isomeren butan. Isobutan anvendes også som emballagegas i levnedsmiddeler med E-nummeret 943b og som kølemiddel under navnet R-600a.
Eksterne henvisninger
- Isobutan i Hazardous Chemical Database
- International Chemical Safety Card 0901
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