2631-72-3
2-Bromo-2',4'-dichloroacetophenone
CAS: 2631-72-3
Molecular Formula: C8H5BrCl2O
2631-72-3 - Names and Identifiers
| Name | 2-Bromo-2',4'-dichloroacetophenone |
| Synonyms | α-Bromo-2,4-dichloroacetophenone W-BROMO-2,4-DICHLORO ACETOPHENONE a-Bromo-2',4'-dichloroacetophenone 2-Bromo-2',4'-dichloroacetophenone ALPHA-BROMO-2',4'-DICHLOROACETOPHENONE 2-Bromo-1-(2,4-dichlorophenyl)-1-ethanol 2-bromo-1-(2,4-dichlorophenyl)ethan-1-one 2-Bromo-1-(2,4-dichlorophenyl)ethan-1-one |
| CAS | 2631-72-3 |
| EINECS | 220-116-7 |
| InChI | InChI=1/C8H5BrCl2O/c9-4-8(12)6-2-1-5(10)3-7(6)11/h1-3H,4H2 |
2631-72-3 - Physico-chemical Properties
| Molecular Formula | C8H5BrCl2O |
| Molar Mass | 267.93 |
| Density | 1.695±0.06 g/cm3(Predicted) |
| Melting Point | 25-29°C(lit.) |
| Boling Point | 103-106 °C(Press: 0.4 Torr) |
| Flash Point | >230°F |
| Solubility | Chloroform, Methanol |
| Appearance | White solid |
| Color | White to brown |
| Storage Condition | Inert atmosphere,2-8°C |
| Sensitive | Lachrymatory |
| Refractive Index | 1.60 |
| MDL | MFCD00053005 |
| Physical and Chemical Properties | Ω-bromo-2, 4-dichloroacetophenone is a white solid, m. P. 58-60 °c, soluble in organic solvents, poorly soluble in water. |
| Use | This product is for scientific research only and shall not be used for other purposes. |
2631-72-3 - Risk and Safety
| 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 - Wear suitable protective clothing. |
| UN IDs | UN 3335 |
| WGK Germany | 3 |
| HS Code | 29147000 |
| Hazard Note | Corrosive/Lachrymatory |
| Hazard Class | 8 |
| Packing Group | II |
2631-72-3 - Reference Information
| introduction | 2-bromo-2 ',4'-dichloroacetophenone, also known as α-bromo-2, 4-dichloroacetophenone, is an organic intermediate that can be used to prepare difenoconazole. Difenoconazole is an excellent variety of triazole fungicides. It has the characteristics of broad spectrum, high efficiency, low residue, long duration and good internal absorption, fumigation and eradication effects. |
| use | ω-bromo -2, 4-dichloroacetophenone is an intermediate of triazole fungicides such as imamazole, propiconazole, pentacyclazole, and ethicyclazole. |
| production method | there are two preparation methods. 2,4-dichloroacetophenone is used as raw material, dissolved in chloroform, bromine is added dropwise, the lower end of the dropper is extended below the liquid surface, and the dropwise is added and stirred. After the bromine is dropped, the bromine is stirred at normal temperature for 2 hours, the reaction is heated and refluxed for 2 hours, the reaction is stopped, the solvent chloroform is distilled and recovered, and the white crystal is cooled to be ω-bromine -2, 4-dichloroacetophenone. Using m-dichlorobenzene as the raw material, first mix m-dichlorobenzene and bromoacetyl chloride, add anhydrous aluminum trichloride step by step in the mixed solution, react below 50 ℃ for several hours, then cool, and add it to ice The water layer is layered in water, the water layer is extracted with dichloromethane, the organic layer is combined, and the dissolving is obtained by omega-bromo-2, 4-dichloroacetophenone. |
Last Update：2024-04-09 15:16:49
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