3-Methyl-4-nitroisoxazole CAS 1122-05-0
| CAS No. | 1122-05-0 |
| Molecular Formula | C4H4N2O3 |
| Molecular Weight | 128.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
CATO supplies 3-Methyl-4-nitroisoxazole (CAS 1122-05-0), a certified reference material (molecular formula C4H4N2O3, MW 128.09 g/mol) for analytical method development and quality control.
3-Methyl-4-nitroisoxazole (C4H4N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H4N2O3 |
| Molecular Weight | 128.09 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.) | 1957 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- 5-Methyl-4-nitroisoxazole (CAS 1122-06-1)
- 4-Nitroisoxazole (CAS 1121-13-7)
- 3-Nitroisoxazole (CAS 39485-31-9)
- 3-Methyl-4-nitroisoxazole-5-carbaldehyde (CAS 6436-64-2)
- 3-Nitroisoxazole-5-carboxamide (CAS 1224594-00-6)
- 5-Nitroisoxazole-3-carboxylic acid (CAS 1368191-38-1)
- Methyl 5-nitroisoxazole-3-carboxylate (CAS 1367269-14-4)
- 3-Methyl-4-nitroisoxazole-5-carboxylic acid (CAS 89282-13-3)
Recommended Standards
- 1-Methyl-4-nitro-1,2,3-triazole (CAS 107945-66-4)
- 5-Nitro-1H-pyrazol-3-amine (CAS 1030139-28-6)
- 1-Methyl-5-nitro-1,2,3-triazole (CAS 1204736-25-3)
- 3-Aminoisoxazole-5-carboxylic acid (CAS 1013929-55-9)
- N2-(((9H-fluoren-9-yl)methoxy)carbonyl)-N6-(amino((2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran)-5-sulfonamido)methylene)-N2-methyl-L-lysine (CAS 2044711-15-9)
- 2-Isopropoxy-4-methylbenzaldehyde (CAS 1159694-54-8)
- Methyl 4-isopropoxy-2-methylbenzofuran-6-carboxylate (CAS 1291492-86-8)
- 1-Fluorocyclopropanesulfonamide (CAS 1108658-19-0)
- 4-ethynyl-1-tetrahydropyran-4-yl-pyrazole (CAS 2098009-40-4)
- N-(2,5-Difluorobenzyl)-1-(1-isobutyl-1H-pyrazol-4-yl)methanamine hydrochloride (CAS 1856067-79-2)
- 3-(Ethylthio)-2-methylpropanenitrile (CAS 18673-12-6)
- (1-Methyl-5-(trifluoromethyl)-1H-pyrrol-2-yl)methanol (CAS 1823920-39-3)
- 2-{[(2,4-dichlorophenyl)methyl]sulfanyl}-4-[3-(trifluoromethyl)phenyl]pyridine-3-carbonitrile (CAS 478245-80-6)
- Allo-D-Ile17-Tirzepatide (CAS CATO-CPTD788962)
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