3,4-Bis(4-methoxyphenyl)-5-methylisoxazole CAS 78967-05-2
| CAS No. | 78967-05-2 |
| Molecular Formula | C18H17NO3 |
| Molecular Weight | 295.33 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 3,4-Bis(4-methoxyphenyl)-5-methylisoxazole (CAS 78967-05-2), a certified reference material (molecular formula C18H17NO3, MW 295.33 g/mol) for analytical method development and quality control.
3,4-Bis(4-methoxyphenyl)-5-methylisoxazole (C18H17NO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C18H17NO3 |
| Molecular Weight | 295.33 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 1 |
Related Bis Standards
- 4-[(4-Methoxyphenyl)methyl]-4-methyl-2-phenyl-5(4H)-oxazolone (CAS 172168-03-5)
- 2,4-Bis(4-methoxyphenyl)-4-oxobutanenitrile (CAS 23073-04-3)
- 3-[2-(4-methoxyphenyl)-1h-indol-3-yl]propanoic acid (CAS 870693-10-0)
- Ethyl 2-(4-methoxyphenyl)indolizine-1-carboxylate (CAS 477862-79-6)
- 6-(4-Methoxyphenyl)-3-(pyrrolidin-2-yl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1706456-17-8)
- 6-(4-Methoxyphenyl)-3-(pyrrolidin-3-yl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1706458-85-6)
- 1-(3-Methoxyphenyl)-3-(1-methyl-1H-indol-3-yl)urea (CAS 899990-53-5)
- 1,3-Bis(4-methoxyphenyl)-1H-pyrazol-5-amine (CAS 618098-09-2)
Recommended Standards
- 3,4,5-Trimethoxy-2’-cyano-di-hydrocinnamaldehyde Dimethylacetal (CAS 7520-70-9)
- 3-(5-Amino-4-(4-fluorophenyl)-1H-pyrazol-1-yl)tetrahydrothiophene 1,1-dioxide (CAS 321574-18-9)
- 3-[5-(benzyloxy)-1h-indol-1-yl]propanoic acid (CAS 445492-18-2)
- 3-(5,6-Dimethyl-1H-indol-2-yl)-4-methoxybenzoic acid (CAS 835595-03-4)
- 1,1'-(9H-Carbazole-3,6-diyl)bis(ethan-1-one) (CAS 3403-70-1)
- 9β-Pregna-4,6-diene-3,20-dione (CAS 2640-38-2)
- 2-Cyclopentyl-4-methyl-1,3-thiazole-5-carboxylic acid (CAS 472805-45-1)
- N-tert-Butyl-3-(trifluoromethyl)benzamide (CAS 340136-34-7)
- N-(4-Chloro-2-methylphenyl)-2-((4-(4-chlorophenyl)-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 476484-05-6)
- 4-Fluoro-1H-indol-5-amine (CAS 1003858-66-9)
- 4-[Tris(4-carbamimidoylphenyl)methyl]benzenecarboximidamide;tetrahydrochloride (CAS 2205867-69-0)
- (E)-3-(5-bromo-2-methoxyphenyl)-1-(4-hydroxyphenyl)prop-2-en-1-one (CAS 1214751-07-1)
- 6-Methoxy-1-methyl-1,2,2a,5-tetrahydropyrrolo[4,3,2-de]quinolin-4(3H)-one (CAS 2824293-63-0)
- Liraglutide Impurity 17 TFA Salt (CAS CATO-C4X-199217)
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