(E)-4-((2-(4-cyano-3-phenylisoxazol-5-yl)vinyl)amino)benzoic acid CAS 303995-75-7
| CAS No. | 303995-75-7 |
| Molecular Formula | C19H13N3O3 |
| Molecular Weight | 331.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies (E)-4-((2-(4-cyano-3-phenylisoxazol-5-yl)vinyl)amino)benzoic acid (CAS 303995-75-7), a certified reference material (molecular formula C19H13N3O3, MW 331.32 g/mol) for analytical method development and quality control.
Structurally, (E)-4-((2-(4-cyano-3-phenylisoxazol-5-yl)vinyl)amino)benzoic acid (C19H13N3O3) contains a steroid 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 331.32 g/mol, it falls into the moderately-high-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.
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.
Physical & Chemical Properties
| Molecular Formula | C19H13N3O3 |
| Molecular Weight | 331.32 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.) | 2025 |
| Nitrogen Atoms | 3 |
Related E Standards
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- (Z)-1-[(4-Cyano-5-methyl-1,2-thiazol-3-yl)sulfonyl]-N-phenylmethanecarbohydrazonoyl cyanide (CAS 337928-19-5)
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Recommended Standards
- (2s)-2-{[(benzyloxy)carbonyl]amino}-3-(3,4-dihydroxyphenyl)propanoic acid (CAS 30033-25-1)
- 1-(2,5-Diphenyloxazol-4-yl)pyrimidine-2,4(1H,3H)-dione (CAS 304865-12-1)
- ((5-Bromo-2-methoxybenzyl)oxy)(tert-butyl)dimethylsilane (CAS 201150-66-5)
- 1-(Bromomethyl)-4-(phenylsulfonyl)benzene (CAS 7705-63-7)
- 1-(3-Hydroxypiperidin-1-yl)-2-phenoxyethan-1-one (CAS 1156589-06-8)
- 1-Benzyl-3-(trifluoromethyl)piperidin-4-amine (CAS 1356338-90-3)
- 3-[4-(trifluoromethyl)phenyl]but-2-enoic acid (CAS 7386-61-0)
- 7-Chloro-5-oxo-2,3,4,5-tetrahydrobenzo[b]oxepin-8-yl pivalate (CAS 2226905-13-9)
- 951887-21-1 4-Iodo-2'-methylbenzophenone MFCD09801664 (CAS 951887-21-1)
- 2,7-Dimethyl-1H-indole-3-carboxylic acid (CAS 1227270-31-6)
- (R)-Morpholine-2-carboxylic acid hydrochloride (CAS 1273577-14-2)
- 6-(Dimethylamino)-1-methyl-3-phenyl-1,3,5-triazine-2,4(1H,3H)-dione (CAS 51235-60-0)
- Ganglioside GD3 Sodium Salt (CAS 62010-37-1)
- Semaglutide impurity 195 (CAS CATO-C4X-2226195)
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