4-Hydroxy-3-phenyl-2H-pyrano[3,2-c]quinoline-2,5(6H)-dione CAS 62668-78-4
| CAS No. | 62668-78-4 |
| Molecular Formula | C18H11NO4 |
| Molecular Weight | 305.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-Hydroxy-3-phenyl-2H-pyrano[3,2-c]quinoline-2,5(6H)-dione.
4-Hydroxy-3-phenyl-2H-pyrano[3,2-c]quinoline-2,5(6H)-dione (CAS 62668-78-4), molecular formula C18H11NO4 and molecular weight 305.28 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Hydroxy-3-phenyl-2H-pyrano[3,2-c]quinoline-2,5(6H)-dione (C18H11NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 14.0, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 305.28 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.
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 | C18H11NO4 |
| Molecular Weight | 305.28 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 1 |
Related Hydroxy Standards
- 4-Hydroxy-6-phenyl-2H-pyrano[3,2-c]quinoline-2,5(6H)-dione (CAS 18706-64-4)
- 4-Hydroxy-3-phenyl-2H-pyrano[2,3-b]quinoline-2,5(10H)-dione (CAS 62668-76-2)
- 7-Hydroxy-3-(4-phenyl-4H-1,2,4-triazol-3-yl)-4H-chromen-4-one (CAS 66819-11-2)
- Ethyl 5-hydroxy-2-oxo-7-(trifluoromethyl)-1,2,5,6,7,8-hexahydroquinoline-3-carboxylate (CAS 1420792-67-1)
- 5-Hydroxy-4-(3-(trifluoromethyl)phenyl)isoquinolin-1(2H)-one (CAS 656234-32-1)
- 5-Hydroxy-4-(4-(trifluoromethyl)phenyl)isoquinolin-1(2H)-one (CAS 656234-33-2)
- 6-Hydroxy-2-[2-(3-hydroxy-4-methoxyphenyl)ethenyl]-5-nitro-4(3H)-pyrimidinone (CAS 797779-25-0)
- (3-Hydroxy-1,2-dihydroquinoxaline-1-carbonyl)-L-leucine (CAS 1173685-44-3)
Recommended Standards
- 7-(Diethylamino)-2-oxo-2H-chromene-3,4-dicarboxylic acid (CAS 75240-77-6)
- 4,7,8,8-Tetramethoxyfuro[2,3-b]quinolin-5(8H)-one (CAS 632335-15-0)
- 8-Hydroxyquinoline-5,7-disulfonic acid (CAS 31568-84-0)
- 4-((((2,2-Dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)methyl)amino)methyl)benzoic acid (CAS 497060-16-9)
- (E)-6-(2-Fluorostyryl)-3-(pyridin-3-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole (CAS 853891-63-1)
- N-((1H-Pyrazol-3-yl)carbamoyl)-4-methylbenzenesulfonamide (CAS 144849-08-1)
- 2-(Benzyloxy)-1-bromonaphthalene (CAS 41908-23-0)
- 5-Methyl-1-(p-tolyl)-1h-pyrazol-4-amine (CAS 1249545-81-0)
- Bilastine Impurity 36 (CAS 1638785-17-7)
- 5-Bromo-1-(cyclopropylmethyl)indoline (CAS 1784059-18-2)
- Baloxavir Impurity 3 (CAS 1985606-14-1)
- 1-(Methyl((tetrahydro-2h-pyran-4-yl)methyl)carbamoyl)cyclopropane-1-carboxylic acid (CAS 1405178-86-0)
- 4-Nitro-1-vinyl-1H-pyrazole (CAS 117451-93-1)
- Semaglutide impurity 01 (CAS 1998701-31-7)
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