3-Methylisoxazole-5-carboxylic Acid CAS 4857-42-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 4857-42-5 |
| Molecular Formula | C5H5NO3 |
| Molecular Weight | 127.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methylisoxazole-5-carboxylic Acid (CAS 4857-42-5) is a pharmaceutical standards certified reference material from CATO. Molecular formula: C5H5NO3. Molecular weight: 127.10 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C5H5NO3 |
| Molecular Weight | 127.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Methylisoxazole Standards
- 4-Methylisoxazole-3-carboxylic Acid (CAS 215872-46-1)
- 4-Methylisoxazole-5-carboxylic Acid (CAS 261350-46-3)
- 5-Methylisoxazole-4-ethanol (CAS 1526803-92-8)
- 5-Methylisoxazole-4-carboxamide (CAS 1097817-28-1)
- N-Methylisoxazole-5-carboxamide (CAS 116235-70-2)
- 3-Methylisoxazole-4-carboxamide (CAS 1314959-75-5)
- 3-Methylisoxazole-5-carboxamide (CAS 38955-11-2)
- 4-Methylisoxazole-3-carboxamide (CAS 38061-70-0)
Recommended Standards
- 3-Methyl-5-nitro-1H-pyrazole (CAS 34334-96-8)
- 4-Amino-1,2,5-oxadiazole-3-carboximidamide (CAS 742637-33-8)
- 3-Methyl-4-nitropyrazole (CAS 5334-39-4)
- 1-(2,4-Xylyl)biguanide (CAS 28510-45-4)
- 1-(4-(2-Chloro-6-nitrophenyl)piperazin-1-yl)ethan-1-one (CAS 430451-25-5)
- 2-Fluoro-5-phenylpentanoic acid (CAS 1071002-03-3)
- N2-(1H-benzimidazol-2-yl)benzene-1,2-diamine (CAS 719285-67-3)
- 1-Piperidineaceticacid, a-(hydroxyimino)-, ethyl ester 120209-12-3 ACMC-20edfo (CAS 120209-12-3)
- Ethyl 2-(1,3-dimethyl-1H-pyrazole-5-carboxamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate (CAS 1013795-84-0)
- Pancreatic Polypeptide (31-36) Free Acid, human (CAS 192432-73-8)
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