| CAS Number | 598-25-4 |
| Catalog Description | 3-Methyl-1,2-butadiene, 98% |
| Synonym | 1,1-Dimethylallene |
| MDL Number | MFCD00008896 |
| Linear formula | (CH3)2C=C=CH2 |
| Master Molecular formula | C5H8 |
| Melting point in C | -148° |
| Boiling point in C | 40-41° |
| Flash point in C | -12° |
| Flash point in F | 10° |
| Density | 0.694 |
| Refractive Index | 1.419 |
| Beilstein | 1697090 |
| Sensitivity | Air Sensitive |
| EC Number | 209-926-1 |
| Shipping | Hazardous for shipping |
| CAS Number | 598-25-4 |
| UN# | UN3295 |
| Haz Class | 3 |
| Packing Group | II |
| Signal Word | Danger |
| Pictogram code 1 |
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| Pictogram code 2 |
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| H Phrases | H225-H304-H315-H319-H335 |
| P Phrases | P210-P301+P310-P303+P361+P353-P305+P351+P338-P405-P501A |
| TSCA | No |
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