1,1-dibromopropan-2-one
1,3-dibromoacetone
CAS: 816-39-7
Molecular Formula: C3H4Br2O
1,1-dibromopropan-2-one - Names and Identifiers
| Name | 1,3-dibromoacetone |
| Synonyms | NSC 249810 1,3-DIBROMOACETONE 1,3-Dibromoacetone 1,3-dibromoacetone 1,3-dibromo-2-propanon Bis(broMoMethyl) Ketone 1,1-dibromopropan-2-one 1,3-Dibromo-2-propanone 1,3-dibromopropan-2-one 1,3-dibroMopropan-2-one 2-Propanone, 1,3-dibromo- 1,3-DIBROMO ACETONE (SYM) 1,3-Dibromopropan-2-one, tech |
| CAS | 816-39-7 |
| EINECS | 212-430-8 |
| InChI | InChI=1/C3H4Br2O/c1-2(6)3(4)5/h3H,1H3 |
1,1-dibromopropan-2-one - Physico-chemical Properties
| Molecular Formula | C3H4Br2O |
| Molar Mass | 215.87 |
| Density | 2.12 |
| Melting Point | 29-30℃ |
| Boling Point | 95 °C (20 mmHg) |
| Flash Point | 97-98°C/21mm |
| Solubility | Soluble in Acetone, Chloroform, Dichloromethane and Methanol |
| Vapor Presure | 0.675mmHg at 25°C |
| Appearance | Liquid |
| Color | Yellow to dark brown |
| BRN | 1740389 |
| Storage Condition | Keep in dark place,Inert atmosphere,Store in freezer, under -20°C |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.5470 |
| MDL | MFCD00013540 |
1,1-dibromopropan-2-one - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | 2927 |
| TSCA | Yes |
| HS Code | 29141900 |
| Hazard Class | 8 |
| Packing Group | Ⅱ |
1,1-dibromopropan-2-one - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| production method | there are acetone method and glycerol method for the synthesis of 1, 3-dibromoacetone.?????????????????????????????????????????????????????????????????????????????????????????????????????? (1) direct bromination of acetone to give 1, 3-dibromoacetone. In a 2L flask, add 99.0g(1.71mol) of acetone, 98.2g(1.64mol) of acetic acid and 2.97g of water; With stirring, add another g (mol) of bromine through a dropping funnel, the bromine droplet acceleration was controlled by adjusting the pressure in the funnel. The reaction temperature was 60 ° C., and the feeding time was about 10H. The mixture was cooled to room temperature, and after 48h, the lower layer was separated, dried over MgSO4, and distilled under reduced pressure to obtain 97.6g(30.4%) of 1, 3-dibromoacetone. It should be noted that special care should be taken when handling the aqueous layer, as HBr is dissolved therein.?????????????????????????????????????????????????????????? (2) 1, 3-dibromoacetone is obtained by Bromination and oxidation of glycerol. G (10.8mol) of glycerol, 25g(1.0mol) of red phosphorus and 1869G (23.4mol) of bromine were added to the flask and reacted to give 1, 3-dibromopropanol in 59% yield. Potassium dichromate and sulfuric acid were then added for oxidation to give 1, 3-dibromoacetone in 67% yield. The greatest advantage of this process is the small number of isomers, and the problem of the formation of isomers is inevitably encountered in the direct bromination of acetone. |
Last Update：2024-04-09 02:00:12
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