Pyrazole
Pyrazole
CAS: 288-13-1
Molecular Formula: C3H4N2
Pyrazole - Names and Identifiers
| Name | Pyrazole |
| Synonyms | Pyrazol Pyrazole Pyrrazole 1,2-Diazole 1H-pyrazole 2-PyrroMonazole PYRAZOLE FOR SYNTHESIS 25 G |
| CAS | 288-13-1 |
| EINECS | 206-017-1 |
| InChI | InChI=1/C3H4N2/c1-2-4-5-3-1/h1-3H,(H,4,5) |
| InChIKey | WTKZEGDFNFYCGP-UHFFFAOYSA-N |
Pyrazole - Physico-chemical Properties
| Molecular Formula | C3H4N2 |
| Molar Mass | 68.08 |
| Density | 1.4088 (rough estimate) |
| Melting Point | 67-70 °C (lit.) |
| Boling Point | 186-188 °C (lit.) |
| Flash Point | 186-188°C |
| Water Solubility | SOLUBLE |
| Solubility | Soluble in water, soluble in alcohol, ether and benzene. |
| Vapor Presure | 21Pa at 20℃ |
| Appearance | White to yellow crystals |
| Color | White to yellow |
| Merck | 14,7960 |
| BRN | 103775 |
| pKa | 2.49(at 25℃) |
| Storage Condition | Store below +30°C. |
| Sensitive | Hygroscopic |
| Refractive Index | 1.4203 |
| MDL | MFCD00005234 |
| Physical and Chemical Properties | Melting Point 67-70 °c, boiling point 186-188 °c. |
| Use | Pyrazoline, a derivative of pyrazole, is an important intermediate for pharmaceuticals and dyes |
Pyrazole - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R52 - Harmful to aquatic organisms R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. |
| UN IDs | 2811 |
| WGK Germany | 1 |
| RTECS | UQ4900000 |
| TSCA | Yes |
| HS Code | 29331990 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
| Toxicity | LD50 (24 hr) in rats, mice (mmol/kg): 19, 21 i.v.; 21, 22 orally (Magnussen) |
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