Urea, 1-(p-chlorophenyl)-
4-Chlorophenylurea
CAS: 140-38-5
Molecular Formula: C7H7ClN2O
Urea, 1-(p-chlorophenyl)- - Names and Identifiers
| Name | 4-Chlorophenylurea |
| Synonyms | p-CPU AI3-20197 NSC 12971 BRN 0908492 4-Chlorophenylurea P-CHLOROPHENYL UREA (p-Chlorophenyl)urea (4-Chlorophenyl)urea 1-(4-chlorophenyl)urea 1-(p-Chlorophenyl)urea N-(4-CHLOROPHENYL)UREA 1-(p-chlorophenyl)-ure Urea, (p-chlorophenyl)- Urea, (4-chlorophenyl)- Urea, 1-(p-chlorophenyl)- CHLORHEXIDINE EP IMPURITY F Urea, (p-chlorophenyl)- (8CI) 4-12-00-01191 (Beilstein Handbook Reference) |
| CAS | 140-38-5 |
| EINECS | 205-412-6 |
| InChI | InChI=1/C7H7ClN2O/c8-5-1-3-6(4-2-5)10-7(9)11/h1-4H,(H3,9,10,11) |
Urea, 1-(p-chlorophenyl)- - Physico-chemical Properties
| Molecular Formula | C7H7ClN2O |
| Molar Mass | 170.6 |
| Density | 1.402±0.06 g/cm3(Predicted) |
| Melting Point | 204-205°C |
| Boling Point | 271.7±23.0 °C(Predicted) |
| Flash Point | 118.1°C |
| Vapor Presure | 0.00634mmHg at 25°C |
| Appearance | White crystalline powder |
| BRN | 908492 |
| pKa | 14.13±0.70(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.649 |
| MDL | MFCD00014788 |
| Physical and Chemical Properties | Chlorophenyl urea pure colorless crystals, m. P. 210 ℃ (decomposition), insoluble in water, soluble in ethanol. |
Urea, 1-(p-chlorophenyl)- - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| RTECS | YS6127000 |
| Hazard Class | IRRITANT |
Urea, 1-(p-chlorophenyl)- - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Use | p-chlorophenylurea is an intermediate for the synthesis of dichloramide by the non-phosgene route (sodium cyanate method). |
| Production method | The preparation method is to obtain p-chlorophenylurea by reacting p-chloroaniline hydrochloride with sodium cyanate. A certain amount of p-chloroaniline, concentrated hydrochloric acid and water are sequentially added to the reaction kettle to dissolve it and cool it to room temperature. Dissolve the solid sodium cyanate in water in another reaction kettle and filter to obtain a colorless solution. Under stirring, the solution is gradually added to the reaction kettle containing p-chloroaniline hydrochloride, and the feeding temperature is controlled so that it does not exceed 30 ℃. After feeding, stir at 30 ℃ for 2h, filter, wash the solid with water for 2-3 times, and dry, that is, the product is p-chlorophenylurea. |
Last Update：2024-04-09 02:00:06
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