A 803467, >98% CAS 944261-79-4
| CAS No. | 944261-79-4 |
| Molecular Formula | C19H16ClNO4 |
| Molecular Weight | 357.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies A 803467, >98% (CAS 944261-79-4), a certified reference material (molecular formula C19H16ClNO4, MW 357.79 g/mol) for analytical method development and quality control.
A 803467, >98% (C19H16ClNO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C19H16ClNO4 |
| Molecular Weight | 357.79 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Recommended Standards
- 7-Chloro-2-(3,4-dimethoxyphenyl)-8-methylquinoline-4-carboxylic acid (CAS 588696-86-0)
- Clometacin (CAS 25803-14-9)
- 7-Chloro-2-(2,5-dimethoxyphenyl)-8-methylquinoline-4-carboxylic acid (CAS 847503-17-7)
- Disperse Red 50 (CAS 40880-51-1)
- Trans-4-(carboxymethyl)-5,7-dichloro-1,2,3,4-tetrahydroquinoline-2-carboxylic acid (CAS 132691-83-9)
- 2-Fluoro-6-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (CAS 2555544-30-2)
- N-(2-chlorophenyl)-4-nitrobenzamide (CAS 2585-28-6)
- 3-(bromomethyl)-6-fluoro-1-methyl-1,2-dihydroquinoxalin-2-one (CAS 1240529-30-9)
- (S)-1-(2,4-dimethylphenyl)-2,2,2-trifluoroethan-1-amine (CAS 1213180-49-4)
- 3-Amino-N-methylbenzamide (CAS 25900-61-2)
- 4-Cyano-N-(5-methylthiazol-2-yl)benzamide (CAS 797016-38-7)
- Lornoxicam impurity 84 (CAS CATO-C4X-201684)
- 2-Chloro-1-(2,5-diethylphenyl)ethanone (CAS 164165-75-7)
- Neuropeptide FF (CAS 99566-27-5)
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