Bromoacetal dehyde dimethyl acetal
Bromoacetaldehyde dimethyl acetal
CAS: 7252-83-7
Molecular Formula: C4H9BrO2
Bromoacetal dehyde dimethyl acetal - Names and Identifiers
Bromoacetal dehyde dimethyl acetal - Physico-chemical Properties
| Molecular Formula | C4H9BrO2 |
| Molar Mass | 169.02 |
| Density | 1.43 g/mL at 25 °C (lit.) |
| Boling Point | 148-150 °C (lit.) |
| Flash Point | 129°F |
| Water Solubility | insoluble |
| Vapor Presure | 4.81mmHg at 25°C |
| Appearance | clear liquid |
| Specific Gravity | 1.445 |
| Color | Colorless to Light orange to Yellow |
| BRN | 1280132 |
| Storage Condition | 2-8°C |
| Sensitive | Moisture Sensitive |
| Refractive Index | n20/D 1.445(lit.) |
| Physical and Chemical Properties | Density 1.43 boiling point 148-150°C refractive index 1.445-1.447 flash point 53°C water-soluble insoluble |
Bromoacetal dehyde dimethyl acetal - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R10 - Flammable R36 - Irritating to the eyes R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/39 - S28A - S16 - Keep away from sources of ignition. |
| UN IDs | UN 1989 3/PG 3 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 8-9-21 |
| TSCA | Yes |
| HS Code | 29110000 |
| Hazard Class | 3 |
| Packing Group | III |
Bromoacetal dehyde dimethyl acetal - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | 2-bromo-1, 1-dimethoxyethane is a bromine-containing pharmaceutical intermediate. Pharmaceutical and pharmaceutical intermediates industry need bromine products nearly 60 kinds. At present, the annual bromine demand of the pharmaceutical industry is about 16,000 tons. With the improvement and progress of industrial technology, the market will gradually expand, and the pharmaceutical intermediates that consume bromine will have a greater development. |
| activation method | in the production of pharmaceutical intermediate 2-bromo-1, in the process of 1-dimethoxyethane, excess bromide ions are removed by adding silver bicarbonate powder to make it active and not easily decomposed. Bromine and vinyl acetate are sequentially added into the reaction tank, and the solution is mixed; Step 1) is stirred at a temperature of 55 ° C., The stirrer is turned on, and a certain proportion of alcohol-water mixture is added for alcoholization; heating at 105~140 C, distillation; Filtration through a circulating filtration device, and adding silver bicarbonate powder 0.1 g-0.5g; Washing with aqueous sodium hydroxide solution; After separating and drying the washed sample, the product 2-bromo-1, 1-dimethoxyethane can be obtained; The silver bicarbonate powder 0.1 g-0.5g is added again, and it is concluded that the product 2-bromo-1 with high activation is not easy to decompose, 1-dimethoxyethane. |
Last Update：2024-04-10 22:29:15
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