56990-02-4
3,5-Dibromobenzaldehyde
CAS: 56990-02-4
Molecular Formula: C7H4Br2O
56990-02-4 - Names and Identifiers
| Name | 3,5-Dibromobenzaldehyde |
| Synonyms | DBBA 3,5-DIBROMOBENZALDEHYDE 3,5-Dibromobenzaldehyde Benzaldehyde, 3,5-dibromo- METHYL3,5-DIBROMOPHENYLACETATE |
| CAS | 56990-02-4 |
| EINECS | 611-441-9 |
| InChIKey | ZLDMZIXUGCGKMB-UHFFFAOYSA-N |
56990-02-4 - Physico-chemical Properties
| Molecular Formula | C7H4Br2O |
| Molar Mass | 263.91 |
| Density | 1.977±0.06 g/cm3(Predicted) |
| Melting Point | 84-88 °C (lit.) |
| Boling Point | 287.2±20.0 °C(Predicted) |
| Water Solubility | insoluble |
| Appearance | Powder or Crystals |
| Color | White to light beige |
| BRN | 2573432 |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Sensitive | Air Sensitive |
| MDL | MFCD00156887 |
56990-02-4 - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - 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 3261 8/PG 2 |
| WGK Germany | 3 |
| HS Code | 29130000 |
| Hazard Class | 8 |
| Packing Group | Ⅱ |
56990-02-4 - Reference Information
| Introduction | 3, 5-dibromobenzaldehyde is white powder, density: 1.977 g/cm3, Boiling Point: 287.221°C at 760 mmHg, Melting Point: 84-88°C(lit.), it can be used as a key intermediate for the production of Ambroxol hydrochloride. |
| Use | 3, 5-dibromobenzaldehyde is a new pesticide and pharmaceutical intermediate, the pesticide synthesized by it has the advantages of strong selectivity, less dosage, high efficiency and low residue, and is a green pesticide. |
| synthesis method | an autoclave was charged with 300 kg1, 2-dichloroethane and 108.8kg of anhydrous aluminum trichloride. 66.6kg Benzaldehyde was added dropwise with stirring. The temperature did not exceed 40 °c. After the drop was stirred for 30min. 110.0kg The bromine treated by drying with concentrated sulfuric acid was added dropwise at 40-45 °c. A sample was taken midway for follow-up to determine if the response was normal. After the drop of heat preservation 5~6H. The tail gas of hydrogen bromide is introduced into water to generate an aqueous solution of hydrobromic acid. Chlorine gas was introduced into the aqueous solution. After stratification and drying treatment, it was replaced with 36.5kg Br2 for recycling. The hydrogen chloride gas formed is absorbed by water circulation to obtain hydrochloric acid as a by-product. Used for the next procedure. After completion of the incubation, the mixture was poured into about 500kg of dilute hydrochloric acid, the above by-product, and washed with stirring to remove aluminum trichloride. Stand in layers. The organic layer was dried over anhydrous magnesium sulfate and subjected to distillation under reduced pressure. 251.1 of 1, 2-dichloroethane was recovered from the pre-fraction; The product fraction was collected at 80 °c (0.133kPa). 109.7kg pale yellow oily liquid was obtained. Wash with a small amount of nahso3. After stratification, drying, and simple distillation, 106.6kg of a colorless transparent oily liquid, 3, 5-dibromobenzaldehyde, was obtained. |
Last Update：2024-04-09 21:21:28
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