31037-02-2
5-Amino-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester
CAS: 31037-02-2
Molecular Formula: C7H11N3O2
31037-02-2 - Names and Identifiers
31037-02-2 - Physico-chemical Properties
| Molecular Formula | C7H11N3O2 |
| Molar Mass | 169.18 |
| Density | 1.29±0.1 g/cm3(Predicted) |
| Melting Point | 96-100 °C |
| Boling Point | 121 °C(Press: 0.05 Torr) |
| Flash Point | 135.5°C |
| Solubility | soluble in Methanol |
| Vapor Presure | 0.00112mmHg at 25°C |
| Appearance | Crystals or Crystalline Powder |
| Color | Yellow |
| Maximum wavelength(λmax) | ['257nm(EtOH)(lit.)'] |
| BRN | 131200 |
| pKa | 2.03±0.10(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Sensitive | Hygroscopic |
| Refractive Index | 1.571 |
| MDL | MFCD00051652 |
| Use | Used as pesticide intermediates, can be directly used to synthesize sulfonamide |
31037-02-2 - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed |
| Safety Description | S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S22 - Do not breathe dust. S36/37 - Wear suitable protective clothing and gloves. |
| WGK Germany | 3 |
| HS Code | 29331990 |
| Hazard Class | IRRITANT |
31037-02-2 - Reference Information
| overview | the synthesis of pyrazolamide is currently mostly based on toluene as a solvent in China, and methylhydrazine and methylhydrazine are cyclized under the action of a catalyst. toluene is evaporated at the end of the reaction, and the material is released while hot to cool and crystallize to obtain a large block of coarse product, which is then crushed, centrifuged, rinsed with cold water and dried. The weight yield is about 85%. Because the material is released while it is hot, the on-site environment is harsh, the large pieces of material obtained after cooling need to be manually broken, and the labor intensity is high. The solvent must be evaporated at the end of each batch of reactions, and the energy consumption is high. Therefore, we propose a pyrazolamide preparation method put into use to solve the above problems. |
| use | pyrazolamide is mainly used as a pesticide intermediate and can be directly used to synthesize sulfonamide. Pyrazolamide is a precursor for the synthesis of pyrazosulphonamide, which is an important intermediate for the synthesis of pyrazosulfuron. Used as a pesticide intermediate, it can be directly used to synthesize sulfonamide |
Last Update：2024-04-09 21:54:55
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