2,3-dimethyl-3-butadiene
2,3-Dimethylbutadiene-1,3
CAS: 513-81-5
Molecular Formula: C6H10
2,3-dimethyl-3-butadiene - Names and Identifiers
2,3-dimethyl-3-butadiene - Physico-chemical Properties
| Molecular Formula | C6H10 |
| Molar Mass | 82.14 |
| Density | 0.726 g/mL at 25 °C (lit.) |
| Melting Point | -76 °C (lit.) |
| Boling Point | 68-69 °C (lit.) |
| Flash Point | −8°F |
| Water Solubility | Miscible with chloroform. Immiscible with water. |
| Vapor Presure | 269 mm Hg ( 37.7 °C) |
| Appearance | Liquid |
| Color | Clear colorless |
| Merck | 14,3238 |
| BRN | 605285 |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.438(lit.) |
| Physical and Chemical Properties | Colorless liquid. Melting Point -76 °c, boiling point 69.2 °c (102kPa),68.8 °c (101.3kPa), relative density 0.7267(20/4 °c), refractive index 1.4380, flash point -22 °c. Soluble in organic solvents, insoluble in water. Long-standing energy polymerization by heating or in sunlight. |
2,3-dimethyl-3-butadiene - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | 11 - Highly Flammable |
| Safety Description | S16 - Keep away from sources of ignition. S23 - Do not breathe vapour. |
| UN IDs | UN 3295 3/PG 2 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 9 |
| TSCA | Yes |
| HS Code | 29012900 |
| Hazard Class | 3 |
| Packing Group | II |
2,3-dimethyl-3-butadiene - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used in the manufacture of synthetic rubber and polymers. |
| Production method | It is obtained by catalytic dehydration of pinacol (tetramethylethylene glycol) through hydrobromic acid. Slowly heat pinacol and 48% hydrobromic acid, and collect the distillate until 95 ℃. The upper liquid is washed with water containing a small amount of hydroquinone, dried with anhydrous calcium chloride, and then fractionated to obtain the finished product. |
Last Update：2024-04-09 21:04:16
