5-(4-Phenoxyphenyl)isoxazole-3-carboxylic Acid CAS 925000-99-3
| CAS No. | 925000-99-3 |
| Molecular Formula | C16H11NO4 |
| Molecular Weight | 281.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(4-Phenoxyphenyl)isoxazole-3-carboxylic Acid (CAS 925000-99-3) is a high-purity analytical reference standard with the molecular formula C16H11NO4 and a molecular weight of 281.26 g/mol.
Structurally, 5-(4-Phenoxyphenyl)isoxazole-3-carboxylic Acid (C16H11NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 281.26 g/mol, it falls into the medium-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.
CATO manufactures 5-(4-Phenoxyphenyl)isoxazole-3-carboxylic Acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C16H11NO4 |
| Molecular Weight | 281.26 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Related Phenoxyphenyl Standards
- N-(2-Phenoxyphenyl)isoxazole-5-carboxamide (CAS 941869-13-2)
- 1-Methyl-3-(4-phenoxyphenyl)imidazolidine-2,4-dione (CAS 923039-41-2)
- 1-(4-Phenoxyphenyl)-1-(1H-pyrrol-2-yl)ethan-1-ol (CAS 1443310-01-7)
- N-(4-Phenoxyphenyl)-1,3,5-triazine-2,4-diamine (CAS 92555-69-6)
- 4-{[(4-phenoxyphenyl)amino]methylidene}-4,5-dihydro-1H-pyrazol-5-one (CAS 477850-93-4)
- 3-(3-Phenoxyphenyl)-4,5-dihydro-1,2-oxazole-5-carboxylic acid (CAS 1038358-01-8)
- 4-Methyl-6-(4-phenoxyphenyl)pyridazin-3(2H)-one (CAS 68195-42-6)
- 5-Oxo-5-(3-phenoxyphenyl)valeric acid (CAS 871127-75-2)
Recommended Standards
- 4-oxo-6-phenoxy-1,4-dihydroquinoline-3-carboxylic acid (CAS 57278-51-0)
- 5-Fluoro-2-phenylsulfonylnitrobenzene (CAS 381666-56-4)
- 4-(Trifluoromethyl)-1,2-dihydro-6-(pyridin-3-yl)-2-thioxopyridine-3-carbonitrile (CAS 893752-69-7)
- 9-Diethoxyphosphoryl-9h-fluorene (CAS 7142-76-9)
- Tetrakis(2-(octyldisulfanyl)ethyl) 3,3',3'',3'''-(((methylazanediyl)bis(ethane-2,1-diyl))bis(azanetriyl))tetrapropionate (CAS 2803699-72-9)
- 5-BEnzyloxy-3-fluoro-2-methyl-phenylamine (CAS 1934507-38-6)
- 2-(2-Amino-6-(bromomethyl)-4-(difluoromethyl)pyridin-3-yl)acetic acid (CAS 1805348-15-5)
- (Z)-1,4-Diethoxy-1,4-dioxo-3-(pyridin-1-ium-1-yl)but-2-ene-2-thiolate (CAS 1321889-46-6)
- 2-(3-Benzoylphenyl)-N-(pyridin-2-yl)acetamide (CAS 60576-14-9)
- (1S,4S)-1-methyl-4-(prop-1-en-2-yl)cyclohex-2-en-1-ol (CAS 425394-92-9)
- (3-Bromo-4-hydroxyphenyl)(isoindolin-2-yl)methanone (CAS 914298-65-0)
- 3-(5-Fluoro-1H-indol-3-yl)-2-methylpropan-1-ol (CAS 890664-13-8)
- 1-Butyl-3-(4-nitrophenyl)urea (CAS 21260-50-4)
- Fragment-[3-31]-Liraglutide (CAS CATO-C4X-199232)
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