Name | 2-Bromoisobutyryl bromide |
Synonyms | A-BROMOISOBUTYRYL BROMIDE 2-Bromoisobutyryl bromide 2-bromoisobutylyl bromide α-Bromoisobutyryl bromide BROMOISOBUTYRYL(2-) BROMIDE ALPHA-BROMOISOBUTYRYL BROMIDE 2-Bromo-2-methylpropanoyl bromide |
CAS | 20769-85-1 |
EINECS | 244-017-3 |
InChI | InChI=1/C4H6Br2O/c1-4(2,6)3(5)7/h1-2H3 |
Molecular Formula | C4H6Br2O |
Molar Mass | 229.898 |
Density | 1.946g/cm3 |
Boling Point | 163°C at 760 mmHg |
Flash Point | 61.8°C |
Water Solubility | reacts |
Vapor Presure | 2.11mmHg at 25°C |
Appearance | Form Liquid, color Clear light yellow to yellow |
Storage Condition | Store below +30°C. |
Refractive Index | 1.522 |
Physical and Chemical Properties | Chemical red liquid. Boiling point 162-164 ℃, relative density 1.860, refractive index 1.5080. Soluble in halogenated hydrocarbons, decompose in water and alcohol. |
Use | Uses Organic synthesis intermediates. |
Hazard Symbols | C - Corrosive |
Risk Codes | 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 3265 |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 29159080 |
Hazard Class | 8 |
Packing Group | II |
Solubility | Miscible with acetone and carbon disulfide. |
Specific gravity | 1.860 (20/4℃) |
Sensitivity | Moisture Sensitive |
BRN | 1746128 |
NIST chemical information | Propanoyl bromide, 2-bromo-2-methyl-(20769-85-1) |
EPA chemical information | Propanoyl bromide, 2-bromo-2-methyl- (20769-85-1) |
Add bromine dropwise to the mixture of isobutyric acid and red phosphorus, react at 100°C for 6h, and evaporate unreacted bromine and hydrogen bromide under reduced pressure. Cooling and dephosphoric acid to obtain crude 2-bromoisobutyryl bromide. The crude product is fractionated under reduced pressure, and the fraction at 91-98 ℃(13.3kPa) is collected, which is the finished product.