5-(1,3-dimethyl-1h-pyraZol-4-yl)-isoxazole-3-carboxylic acid hydrazide CAS 1004644-09-0
| CAS No. | 1004644-09-0 |
| Molecular Formula | C9H11N5O2 |
| Molecular Weight | 221.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(1,3-dimethyl-1h-pyraZol-4-yl)-isoxazole-3-carboxylic acid hydrazide (CAS 1004644-09-0) is a high-purity analytical reference standard with the molecular formula C9H11N5O2 and a molecular weight of 221.22 g/mol.
The molecular framework of 5-(1,3-dimethyl-1h-pyraZol-4-yl)-isoxazole-3-carboxylic acid hydrazide (C9H11N5O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-(1,3-dimethyl-1h-pyraZol-4-yl)-isoxazole-3-carboxylic acid hydrazide 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.
Physical & Chemical Properties
| Molecular Formula | C9H11N5O2 |
| Molecular Weight | 221.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Nitrogen Atoms | 5 |
Related dimethyl Standards
- 5-(1,5-Dimethyl-1h-pyrazol-4-yl)isoxazole-3-carbohydrazide (CAS 1001519-08-9)
- 1,3-Dimethyl-4-((4-nitro-1h-pyrazol-1-yl)methyl)-1h-pyrazole (CAS 1004644-28-3)
- 3-{dimethyl-[1,2,3,4]tetrazolo[1,5-a]pyrimidin-6-yl}propanoic acid (CAS 1016504-48-5)
- 1-[3,5-dimethyl-1-(2,2,2-trifluoroethyl)-1h-pyrazol-4-yl]ethan-1-amine (CAS 1343793-69-0)
- 1,3-Dimethyl-7,9-dihydro-1H-imidazo[2,1-f]purine-2,4(3H,6H)-dione (CAS 49687-12-9)
- 2,4-Dimethyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-carboxylic acid (CAS 1092352-50-5)
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Recommended Standards
- Z-dehydro-Ala-OH (CAS 39692-63-2)
- 1-Ethyl-4-((4-nitro-1H-pyrazol-1-yl)methyl)-1H-pyrazole (CAS 1005639-80-4)
- N-Acetyl-D-galactosamine (CAS 1811-31-0)
- 3-(3-(Trifluoromethyl)-1h-pyrazol-1-yl)pentan-1-amine (CAS 1006320-16-6)
- DMPU-HF Complex (HF 65% w/w) 287966-55-6 (CAS 287966-55-6)
- 4-Bromo-2,3-difluoro-6-iodo-1-(trimethylsilyl)benzene (CAS 1807646-35-0)
- N-(2-Aminophenyl)-4-((7-methoxy-2H-indazol-2-yl)methyl)benzamide (CAS 920315-43-1)
- 6-bromo-N-methoxy-N-methylchroman-2-carboxamide (CAS 2007917-02-2)
- 6-ethyl-1,7-naphthyridin-2-amine (CAS 2891455-57-3)
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- Fatty Acid Methyl Esters Mix 37 (CAS CATO-CCFD901037)
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