5-Methyl-2,4-dihydro-3H-pyrazole-3-one
3-Methyl-5-Pyrazolone
CAS: 108-26-9;132712-71-1
Molecular Formula: C4H6N2O
5-Methyl-2,4-dihydro-3H-pyrazole-3-one - Names and Identifiers
| Name | 3-Methyl-5-Pyrazolone |
| Synonyms | TIMTEC-BB SBB004372 3-Methyl-5-Pyrazolone 3-methyl pyrazole-5-one 3-Methyl-1H-pyrazol-5-ol 3-methyl-2-pyrazolin-5-on 3-Methyl-2-pyrazolin-5-one 2-Pyrazolin-5-one, 3-methyl- 5-methyl-2,4-dihydro-3H-pyrazol-3-one 5-methyl-1,2-dihydro-3H-pyrazol-3-one 3-Methyl-4,5-dihydro-1H-pyrazole-5-one 5-Methyl-2,4-dihydro-3H-pyrazole-3-one |
| CAS | 108-26-9 132712-71-1 |
| EINECS | 203-565-3 |
| InChI | InChI=1/C4H6N2O/c1-3-2-4(7)6-5-3/h2H,1H3,(H2,5,6,7) |
5-Methyl-2,4-dihydro-3H-pyrazole-3-one - Physico-chemical Properties
| Molecular Formula | C4H6N2O |
| Molar Mass | 98.1 |
| Density | 1.1890 (rough estimate) |
| Melting Point | 220-224 °C |
| Boling Point | 183.6°C (rough estimate) |
| Flash Point | 141.1°C |
| Solubility | Slightly soluble in ethanol. |
| Vapor Presure | 0.000345mmHg at 25°C |
| Appearance | Pale yellow powder |
| Color | White to Light yellow |
| pKa | 13.10±0.40(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.4327 (estimate) |
| MDL | MFCD00014091 |
5-Methyl-2,4-dihydro-3H-pyrazole-3-one - Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | UQ9451500 |
| TSCA | Yes |
| HS Code | 29331990 |
5-Methyl-2,4-dihydro-3H-pyrazole-3-one - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-09 20:45:29
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