1,4-dibromo-2-butylene
1,4-dibromobut-2-ene
CAS: 6974-12-5;30794-77-5
Molecular Formula: C4H6Br2
1,4-dibromo-2-butylene - Names and Identifiers
| Name | 1,4-dibromobut-2-ene |
| Synonyms | 1,4-dibromo-2-butene 1,4-dibromobut-2-ene 1,4-dibromo-2-butylene (2Z)-1,4-dibromobut-2-ene TRANS-1,4-DIBROMO-2-BUTENE |
| CAS | 6974-12-5 30794-77-5 |
| EINECS | 230-219-9 |
| InChI | InChI=1/C4H6Br2/c5-3-1-2-4-6/h1-2H,3-4H2/b2-1- |
1,4-dibromo-2-butylene - Physico-chemical Properties
| Molecular Formula | C4H6Br2 |
| Molar Mass | 213.9 |
| Density | 1.867g/cm3 |
| Melting Point | 48-51 °C(lit.) |
| Boling Point | 203°C at 760 mmHg |
| Flash Point | 71.9°C |
| Vapor Presure | 0.405mmHg at 25°C |
| Color | colorless to slightly brown |
| Storage Condition | Sealed in dry,2-8°C |
| Refractive Index | 1.542 |
| Physical and Chemical Properties | The chemical properties are mainly composed of trans [821-06-7], which are foliate crystals. The melting point is 54 ℃, and the boiling point is 74-76 ℃(0.24kPa). |
| Use | Use as an intermediate in organic synthesis. |
1,4-dibromo-2-butylene - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R25 - Toxic if swallowed R34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2923 8/PG 2 |
| WGK Germany | 2 |
| RTECS | EM4725000 |
| FLUKA BRAND F CODES | 8-19 |
1,4-dibromo-2-butylene - Upstream Downstream Industry
| Raw Materials | Bromide |
| Downstream Products | 2-Phenyl-1,2,3,4-tetrahydronaphthalene TRANS-2-BUTENE-1,4-DICARBOXYLIC ACID |
1,4-dibromo-2-butylene - Production method
It is obtained by the reaction of 1,3-butadiene and bromine. 126g of liquid, 1,3-butadiene was added to 250ml of carbon tetrachloride solution cooled to -5~15 ℃, and 76ml of bromine dissolved in 100ml of carbon tetrachloride solution was added dropwise under stirring. After being placed for two days, carbon tetrachloride is evaporated under reduced pressure, about 1 volume of petroleum ether is added at a temperature of 60-90 ℃, filtered while hot, 172.8g of dibromide is precipitated after the filtrate is cooled, and 78.5g is precipitated after standing for 10 days, resulting in a total of 251.3g of finished product with a yield of 79%.
Last Update：2024-04-10 22:29:15
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Product Name: TRANS-1,4-DIBROMO-2-BUTENE Visit Supplier Webpage Request for quotation
CAS: 6974-12-5
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QQ: 3008007409
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CAS: 6974-12-5
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
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Raw Materials for 1,4-dibromo-2-butylene
Downstream Products for 1,4-dibromo-2-butylene