Introduction：Basic information about CAS 42831-50-5|5-Methyl-4-isoxazolecarboxylic acid, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
| Common Name | 5-Methyl-4-isoxazolecarboxylic acid |
|---|
| CAS Number | 42831-50-5 | Molecular Weight | 127.098 |
|---|
| Density | 1.3±0.1 g/cm3 | Boiling Point | 308.3±22.0 °C at 760 mmHg |
|---|
| Molecular Formula | C5H5NO3 | Melting Point | 144-148 °C(lit.) |
|---|
| MSDS | / | Flash Point | 140.3±22.3 °C |
|---|
Names
| Name | 5-Methylisoxazole-4-carboxylic Acid |
|---|
| Synonym | More Synonyms |
|---|
Chemical & Physical Properties
| Density | 1.3±0.1 g/cm3 |
|---|
| Boiling Point | 308.3±22.0 °C at 760 mmHg |
|---|
| Melting Point | 144-148 °C(lit.) |
|---|
| Molecular Formula | C5H5NO3 |
|---|
| Molecular Weight | 127.098 |
|---|
| Flash Point | 140.3±22.3 °C |
|---|
| Exact Mass | 127.026939 |
|---|
| PSA | 63.33000 |
|---|
| LogP | 0.22 |
|---|
| Vapour Pressure | 0.0±0.7 mmHg at 25°C |
|---|
| Index of Refraction | 1.514 |
|---|
| InChIKey | VQBXUKGMJCPBMF-UHFFFAOYSA-N |
|---|
| SMILES | Cc1oncc1C(=O)O |
|---|
Safety Information
| Hazard Codes | Xi:Irritant; |
|---|
| Risk Phrases | R36/37/38 |
|---|
| Safety Phrases | S22-S26-S36/37/39-S36 |
|---|
| WGK Germany | 3 |
|---|
| HS Code | 2934999090 |
|---|
Customs
| HS Code | 2934999090 |
|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
|---|
Synonyms
| T5NOJ C1 DVQ |
| 4-Isoxazolecarboxylic acid, 5-methyl- |
| 5-Methylisoxazole-4-carboxylic acid |
| 5-Methyl-4-isoxazolecarboxylic acid |
| 5-Methyl-1,2-oxazole-4-carboxylic acid |
| MFCD00955655 |
| Leflunomide Impurity 4 |
