1192-21-8
1-methyl-1H-pyrazol-5-ylamine
CAS: 1192-21-8
Molecular Formula: C4H7N3
1192-21-8 - Names and Identifiers
| Name | 1-methyl-1H-pyrazol-5-ylamine |
| Synonyms | NSC 76510 1-Methylpyrazol-5-ylaMine 2-Methyl-3-aMino-pyrazole 1-methyl-1H-pyrazol-5-amine 1-Methyl-5-amino-1H-pyrazole 1-methyl-1H-pyrazol-5-ylamine 1-Methyl-1H-pyrazol-5-amine, 2-Methyl-2H-pyrazol-3-amine |
| CAS | 1192-21-8 |
| EINECS | 688-112-1 |
| InChI | InChI=1/C4H7N3/c1-7-3-2-4(5)6-7/h2-3H,1H3,(H2,5,6) |
1192-21-8 - Physico-chemical Properties
| Molecular Formula | C4H7N3 |
| Molar Mass | 97.12 |
| Density | 1.22±0.1 g/cm3(Predicted) |
| Melting Point | 73 °C |
| Boling Point | 95-96°C (0.5 mmHg) |
| Flash Point | 93.756°C |
| Solubility | Chloroform (Slightly), DMSO (Slightly), Ethyl Acetate (Slightly), Methanol (Slig |
| Vapor Presure | 0.062mmHg at 25°C |
| Appearance | off-white powder/off-white solid |
| Color | Dark Red to Orange to Brown |
| pKa | 4.16±0.10(Predicted) |
| Storage Condition | 2-8°C(protect from light) |
| Refractive Index | 1.601 |
| MDL | MFCD00068156 |
1192-21-8 - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | 2811 |
| HS Code | 29331990 |
| Hazard Class | IRRITANT |
1192-21-8 - Reference Information
| use | 1-methyl -5-aminopyrazole can be used as an intermediate in pharmaceutical synthesis. |
| preparation | compound (1-a)(50g;1.0mol) is dissolved in 40mL of ethanol, and the obtained solution is cooled to 0°C. While stirring the cooled solution, compound (1-b)(53g;1.0mol) was dropwise added to it, and then stirring was carried out for 1 hour. After cooling the obtained solution, ethanol (250mL) and NaHCO3(2.5g) were added to it, and then compound (1-c)(31g;1.0mol) was added. The resulting solution was heated to an internal temperature of 45°C and stirred for 30 minutes. The solution after stirring for 30 minutes was cooled to 0°C, and then NaOEt (sodium ethoxide)(3g) was added to it. The resulting solution was heated to an internal temperature of 85°C, stirred for 3 hours and then cooled. A solution containing 1-methyl -5-aminopyrazole was obtained by the above. |
Last Update：2024-04-09 02:00:06
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