1-(3,4-dichlorophenyl)-1-hydroxyurea
3,4-DICHLOROPHENYL HYDROXY UREA
CAS: 128523-56-8
Molecular Formula: C7H6Cl2N2O2
1-(3,4-dichlorophenyl)-1-hydroxyurea - Names and Identifiers
| Name | 3,4-DICHLOROPHENYL HYDROXY UREA |
| Synonyms | 3,4-DICHLOROPHENYL HYDROXY UREA 1-(3,4-dichlorophenyl)-1-hydroxyurea |
| CAS | 128523-56-8 |
1-(3,4-dichlorophenyl)-1-hydroxyurea - Physico-chemical Properties
| Molecular Formula | C7H6Cl2N2O2 |
| Physical and Chemical Properties | This product is white crystal, m.p.132 ~ 136 ℃, insoluble in water and general organic solution, but easily soluble in alkali aqueous solution. |
1-(3,4-dichlorophenyl)-1-hydroxyurea - References
| Use | 3, 4-dichlorophenyl hydroxyurea is an intermediate of the herbicide rifuron. |
| production method | the preparation method is to add water and hydroxylamine sulfate into the reaction kettle at the same time, and start the stirring, and cooled to (20±5) c, dropwise addition of sodium hydroxide aqueous solution, about 1 h, the solution pH = 7.5~7.9. At this time, 10%3, 4-dichlorophenyl isocyanate toluene solution was added dropwise, the temperature was controlled at (30±2)℃, and about 1.5 h was dropped, and the reaction was continued to stir for 2 h, and left to stand for 2 h, layered. The supernatant of the upper layer of toluene is removed and recovered, and the lower layer of material is added with water and stirred to obtain a solid, which is centrifuged and filtered, and the obtained solid is dried to obtain a finished product. |
Last Update：2024-04-10 22:29:15
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