3-(3-Methylisoxazol-5-yl)-2-(2-nitrophenyl)quinazolin-4(3H)-one CAS 90059-41-9
| CAS No. | 90059-41-9 |
| Molecular Formula | C18H12N4O4 |
| Molecular Weight | 348.31 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-(3-Methylisoxazol-5-yl)-2-(2-nitrophenyl)quinazolin-4(3H)-one (CAS 90059-41-9), a certified reference material (molecular formula C18H12N4O4, MW 348.31 g/mol) for analytical method development and quality control.
Structurally, 3-(3-Methylisoxazol-5-yl)-2-(2-nitrophenyl)quinazolin-4(3H)-one (C18H12N4O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 348.31 g/mol, it falls into the moderately-high-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C18H12N4O4 |
| Molecular Weight | 348.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 4 |
Related Methylisoxazol Standards
- 3-(3-Methylisoxazol-5-yl)-2-(4-nitrophenyl)quinazolin-4(3H)-one (CAS 90059-42-0)
- N4-(5-Methylisoxazol-3-yl)-N1-(thiophen-2-ylmethyl)piperidine-1,4-dicarboxamide (CAS 1251548-50-1)
- N1-(5-Methylisoxazol-3-yl)-N2-(2-(pyrrolidin-1-yl)-2-(thiophen-3-yl)ethyl)oxalamide (CAS 946303-08-8)
- N-(5-Methylisoxazol-3-yl)-2-((3-(o-tolyl)-1,2,4-thiadiazol-5-yl)thio)acetamide (CAS 864918-94-5)
- 2-((5-Methylisoxazol-3-yl)amino)-2-oxoethyl 3,4,5-trimethoxybenzoate (CAS 736190-82-2)
- 4-((4-(N-(5-methylisoxazol-3-yl)sulfamoyl)phenyl)amino)-4-oxobutanoic acid (CAS 133071-57-5)
- N-(3-Methylisoxazol-5-yl)-1-(thiophen-2-ylsulfonyl)piperidine-3-carboxamide (CAS 1021250-26-9)
- (5-Methylisoxazol-3-yl)(4-(((4-methylthiazol-2-yl)thio)methyl)piperidin-1-yl)methanone (CAS 1428356-34-6)
Recommended Standards
- 2,4-toluene diisocyanate dimer (CAS 26747-90-0)
- 2,2'-((Oxybis(ethane-2,1-diyl))bis(oxy))bis(nitrobenzene) (CAS 54533-65-2)
- 3-[(4-Nitrophenyl)[(2-tetrahydropyranyl)oxy]methyl]isoxazole-4-carboxylic Acid (CAS 2006277-51-4)
- 2-(4-(2,2-Dicyanovinyl)phenoxy)-N-(3-nitrophenyl)acetamide (CAS 331962-84-6)
- 2-Aminobutanenitrile (CAS 40651-89-6)
- 3-(2-Methylcyclopropyl)-4-(thiophen-2-yl)-1h-pyrazol-5-amine (CAS 1340597-78-5)
- 1-[1-(4-Bromophenyl)cyclobutyl]-3-methylbutylamine (CAS 1895751-01-5)
- N-(5-Formylthiazol-2-yl)acetamide (CAS 252662-37-6)
- N-(3,4-difluorophenyl)-3-(trifluoromethyl)benzamide (CAS 866143-03-5)
- (5-Cyclopropylisoxazol-4-yl)methanol (CAS 1896506-45-8)
- 1-(3-Azetidinyl)-N,N-dimethylmethanamine Dihydrochloride (CAS 321890-22-6)
- 2-(4-Hydroxyphenyl)acetohydrazide (CAS 20277-02-5)
- 3-(4-Fluorophenoxy)-7-hydroxy-4H-1-benzopyran-4-one (CAS 124330-34-3)
- Allo-Thr5-Tirzepatide (CAS CATO-CPTD788934)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com