| Name | 3-Hydroxy-1H-indazole |
| Synonyms | 3-indazolone Indazolinone 3-Indazolinone 1H-Indazol-3-ol 1H-indazol-3-one 3-Hydroxyindazole 3-Hydroxy-1H-indazole 1,2-Dihydro-3H-indazol-3-one 2,3-Dihydro-1H-indazole-3-one 3-Oxoindazoline, Indazolin-3-one |
| CAS | 7364-25-2 |
| EINECS | 230-904-2 |
| InChI | InChI=1/C7H6N2O/c10-7-5-3-1-2-4-6(5)8-9-7/h1-4H,(H2,8,9,10) |
| Molecular Formula | C7H6N2O |
| Molar Mass | 134.14 |
| Density | 1.2296 (rough estimate) |
| Melting Point | 250-252 °C (lit.) |
| Boling Point | 247.23°C (rough estimate) |
| Flash Point | 88.3°C |
| Vapor Presure | 0.472mmHg at 25°C |
| Appearance | powder to crystal |
| Color | White to Light yellow to Light orange |
| Maximum wavelength(λmax) | ['306nm(MeOH)(lit.)'] |
| BRN | 3733 |
| pKa | 11.94±0.20(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.5880 (estimate) |
| Physical and Chemical Properties | White solid |
| Hazard Symbols | Xi - Irritant![]() |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 10 |
| TSCA | Yes |
| Hazard Note | Irritant |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | for organic synthesis. |
| production method | 47.1g(0.25mol) of O-carboxyphenylhydrazine hydrochloride and hydrochloric acid are heated under reflux for 0.5h, it was concentrated to 1/4 of the volume of the Mycoplasma, neutralized with sodium carbonate, left for 2H, filtered off 3-indazolinone, washed with cold water and dried to give 30-33g of product. |