4-(phenylhydrazono)cyclohexa-2,5-dien-1-one
p-Hydroxyazobenzene
CAS: 1689-82-3
Molecular Formula: C12H10N2O
4-(phenylhydrazono)cyclohexa-2,5-dien-1-one - Names and Identifiers
| Name | p-Hydroxyazobenzene |
| Synonyms | CI 11800 C.I. 11800 CI NO 11800 SOLVENT YELLOW 7 P-PHENYLAZOPHENOL 4-PHENYLAZOPHENOL 4-phenylazophenol 4-BENZENEAZOPHENOL 4-HYDROXYAZOBENZENE 4-Hydroxyazobenzene P-HYDROXYAZOBENZENE p-Hydroxyazobenzene C.I. Solvent Yellow 7 4-(phenyldiazenyl)phenol 4-[(E)-phenyldiazenyl]phenol 4-(phenylhydrazono)cyclohexa-2,5-dien-1-one |
| CAS | 1689-82-3 |
| EINECS | 216-880-6 |
| InChI | InChI=1/C12H10N2O/c15-12-8-6-11(7-9-12)14-13-10-4-2-1-3-5-10/h1-9,15H |
4-(phenylhydrazono)cyclohexa-2,5-dien-1-one - Physico-chemical Properties
| Molecular Formula | C12H10N2O |
| Molar Mass | 198.22 |
| Density | 1.1447 (rough estimate) |
| Melting Point | 150-152°C(lit.) |
| Boling Point | 230°C/20mmHg(lit.) |
| Flash Point | 233.646°C |
| Water Solubility | Soluble in acetone, ethanol, benzene and ether. Insoluble in water. |
| Solubility | DMSO, Methanol |
| Vapor Presure | 0mmHg at 25°C |
| Appearance | Orange columnar solid |
| Color | Brown |
| BRN | 957567 |
| pKa | 8.93±0.13(Predicted) |
| Storage Condition | 2-8°C |
| Refractive Index | 1.6330 (estimate) |
| MDL | MFCD00002330 |
| Physical and Chemical Properties | Orange columnar solid. Melting point 155-157 °c, boiling point 220-230 °c (2.67kPa). Soluble in alcohol, ether, soluble in dilute alkali solution and concentrated sulfuric acid in yellow, slightly soluble in hot water, insoluble in cold water. |
4-(phenylhydrazono)cyclohexa-2,5-dien-1-one - 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 - Wear suitable protective clothing. |
| UN IDs | 3234 |
| WGK Germany | 3 |
| RTECS | SM8300000 |
| TSCA | Yes |
| HS Code | 29270000 |
4-(phenylhydrazono)cyclohexa-2,5-dien-1-one - Reference Information
| color index | 11800 |
| (IARC) carcinogen classification | 3 (Vol. 8, Sup 7) 1987 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used as an intermediate and indicator for organic synthesis. |
| production method | is obtained by diazotization and coupling of aniline. Put hydrochloric acid and crushed ice into the reaction pot, add aniline under stirring, and slowly add sodium nitrite solution below 5 ℃. Test with starch potassium iodide test paper, dark blue to reach the end of the reaction. Prepare sodium phenol salt solution in a coupling pot, add crushed ice, slowly add the above diazotization solution under stirring, and control the reaction below 15 ℃. After feeding, continue stirring for 20min. Then adjust the pH to 3-4 with dilute hydrochloric acid, stir for 30min and then centrifuge for filtration. The filter cake is washed with water until neutral and dried to obtain hydroxyazobenzene. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:40:09
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