4-Bromobenzhydrazide
4-Bromobenzhydrazide
CAS: 5933-32-4
Molecular Formula: C7H7BrN2O
4-Bromobenzhydrazide - Names and Identifiers
| Name | 4-Bromobenzhydrazide |
| Synonyms | 4-BROMOBENZHYDRAZIDE 4-Bromobenzhydrazide 4-BROMOBENZOHYDRAZIDE 4-bromobenzohydrazide 4-BROMOBENZOYLHYDRAZINE 4-BROMOBENZOIC HYDRAZIDE 4-Bromobenzoic hydrazide 4-BROMO-BENZOIC ACID HYDRAZIDE Benzoic acid, p-bromo-, hydrazide Benzoic acid, 4-bromo-, hydrazide |
| CAS | 5933-32-4 |
| EINECS | 227-681-9 |
| InChI | InChI=1/C7H7BrN2O/c8-6-3-1-5(2-4-6)7(11)10-9/h1-4H,9H2,(H,10,11) |
4-Bromobenzhydrazide - Physico-chemical Properties
| Molecular Formula | C7H7BrN2O |
| Molar Mass | 215.05 |
| Density | 1.615±0.06 g/cm3(Predicted) |
| Melting Point | 167-169°C |
| Boling Point | 353.2°C at 760 mmHg |
| Flash Point | 167.4°C |
| Water Solubility | Soluble in hot methanol (almost transparency). Slightly soluble in water. |
| Vapor Presure | 1.34E-05mmHg at 25°C |
| Appearance | Powder |
| Color | Light beige |
| BRN | 777006 |
| pKa | 12.09±0.10(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Refractive Index | 1.615 |
| MDL | MFCD00007602 |
4-Bromobenzhydrazide - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - 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. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| RTECS | DG4449250 |
| HS Code | 29280000 |
4-Bromobenzhydrazide - Reference Information
| Application | p-bromobenzoyl hydrazine is an organic intermediate that can be prepared by reacting methyl 4-bromobenzoate with hydrazine hydrate. It has been reported in the literature to be useful in the preparation of 1,3, 4-oxadiazoles and their derivatives. |
| preparation | Add p-bromobenzoic acid (10.0g,49.75mmol) and 100mL Tetrahydrofuran, then add N,N'-carbonyl diimidazole (10.45g,64.68mmol),TLC monitor raw material reaction is complete, after the reaction is finished, slowly add 80% hydrazine hydrate (4.93g,78.77mmol), drop finish, stirred for about 6 hours. TLC was used to monitor whether the reaction of the starting material was complete (developing solvent: petroleum ether /ethyl acetate 1:1). After completion of the reaction, the reaction mixture was cooled to room temperature, and concentrated under reduced pressure to remove most of the organic solvent. About 30ml of water was added, and the mixture was pulped at room temperature for a while, suction filtered, and washed with water to obtain a white flaky solid. Recrystallization from 15mL absolute ethanol gave 9.09g of a white solid of intermediate 3, yield 85%. m. P. 166~167 ℃, consistent with the literature value. |
Last Update：2024-04-10 22:29:15
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