5-Methyl-4-Isoxazolecarboxylic Acid
5-Methyl-4-isoxazole carboxylic acid
CAS: 42831-50-5
Molecular Formula: C5H5NO3
5-Methyl-4-Isoxazolecarboxylic Acid - Names and Identifiers
5-Methyl-4-Isoxazolecarboxylic Acid - Physico-chemical Properties
| Molecular Formula | C5H5NO3 |
| Molar Mass | 127.1 |
| Density | 1.348±0.06 g/cm3(Predicted) |
| Melting Point | 144-148°C(lit.) |
| Boling Point | 308.3±22.0 °C(Predicted) |
| Flash Point | 140.3°C |
| Solubility | DMSO (Slightly), Methanol (Slightly) |
| Vapor Presure | 0.000297mmHg at 25°C |
| Appearance | Creamy white to brown solid |
| Color | White to Pale Brown |
| BRN | 116000 |
| pKa | 2.85±0.25(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| MDL | MFCD00955655 |
| Physical and Chemical Properties | |
| Use | Used as a pharmaceutical intermediate of leflunomide |
5-Methyl-4-Isoxazolecarboxylic Acid - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R37/38 - Irritating to respiratory system and skin. R36 - Irritating to the eyes R10 - Flammable |
| Safety Description | S22 - Do not breathe dust. 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. S36 - Wear suitable protective clothing. S16 - Keep away from sources of ignition. |
| WGK Germany | 3 |
| HS Code | 29349990 |
| Hazard Class | IRRITANT |
5-Methyl-4-Isoxazolecarboxylic Acid - Reference Information
| Use | Used as a pharmaceutical leflunomide intermediate |
Last Update：2024-04-09 21:21:28
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