3-Methylisoxazole-5-carbohydrazide CAS 89179-79-3
| CAS No. | 89179-79-3 |
| Molecular Formula | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Methylisoxazole-5-carbohydrazide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
3-Methylisoxazole-5-carbohydrazide (CAS 89179-79-3) is a high-purity analytical reference standard with the molecular formula C5H7N3O2 and a molecular weight of 141.13 g/mol.
Structurally, 3-Methylisoxazole-5-carbohydrazide (C5H7N3O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 141.13 g/mol, it falls into the low-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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.) | 1982 |
| Nitrogen Atoms | 3 |
Related Methylisoxazole Standards
- 5-Methylisoxazole-3-carbohydrazide (CAS 62438-03-3)
- Methyl 3-methylisoxazole-5-carboxylate (CAS 1004-96-2)
- 3-Methylisoxazole-4-acetic Acid (CAS 1008304-86-6)
- 5-Methylisoxazole-4-acetic Acid (CAS 1369144-11-5)
- 3-Methylisoxazole-5-acetic Acid (CAS 19668-85-0)
- 5-Methylisoxazole-3-acetic Acid (CAS 57612-87-0)
- Methyl 3-Methylisoxazole-4-carboxylate (CAS 92234-50-9)
- Methyl 4-methylisoxazole-5-carboxylate (CAS 261350-48-5)
Recommended Standards
- 3-Methyl-5-oxo-4,5-dihydro-1H-pyrazole-1-carboxamide (CAS 57303-41-0)
- 4-(Methylamino)-1H-1,2,3-triazole-5-carboxamide (CAS 79248-05-8)
- 3-Methyl-5-oxo-2,5-dihydro-1H-pyrazole-1-carboxamide (CAS 89179-80-6)
- 4,4,4-Trifluoro-2-methylbutan-1-amine (CAS 766477-05-8)
- 2-(Phenylthio)acetimidamide hydrochloride (CAS 84544-86-5)
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- (1R,4S,5R)-2-(tert-butoxycarbonyl)-2-azabicyclo[2.2.1]Heptane-5-carboxylic acid (CAS 2165408-95-5)
- 3-Phenylpentane-1,3,5-tricarboxylic acid (CAS 17724-90-2)
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