4-(5-((8-Ethoxyquinolin-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)butanoic acid CAS 902021-66-3
| CAS No. | 902021-66-3 |
| Molecular Formula | C19H18N2O4S2 |
| Molecular Weight | 402.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-(5-((8-Ethoxyquinolin-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)butanoic acid (CAS 902021-66-3), molecular formula C19H18N2O4S2 and molecular weight 402.49 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 4-(5-((8-Ethoxyquinolin-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)butanoic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 402.49 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C19H18N2O4S2 |
| Molecular Weight | 402.49 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Ethoxyquinolin Standards
- 2-(6-Ethoxyquinolin-4-yl)-1-(6-methylpyridin-2-yl)ethanone (CAS 676343-32-1)
- 2-(7-Ethoxyquinolin-4-yl)-1-(pyridin-2-yl)ethanone (CAS 676331-51-4)
- N-(8-Ethoxyquinolin-5-yl)benzamide (CAS 605-90-3)
- 5-(6-Ethoxyquinolin-4-yl)-3-(hydroxymethyl)-1,3,4-oxadiazol-2(3H)-one (CAS 89046-51-5)
- 3-(2-Ethoxyquinolin-3-yl)acrylic acid (CAS 556016-27-4)
- 1-(6-Ethoxyquinolin-2-yl)ethanamine (CAS 151506-15-9)
- 1-(8-Ethoxyquinolin-2-yl)ethanone (CAS 1245645-56-0)
- 1-(2-Ethoxyquinolin-4-yl)ethanone (CAS 92028-69-8)
Recommended Standards
- 4-(3,5,5-Triphenyl-4,5-dihydro-1H-pyrazol-1-yl)benzaldehyde (CAS 88405-42-9)
- 5-(4-(Morpholinosulfonyl)phenyl)-4-phenyl-4H-1,2,4-triazole-3-thiol (CAS 917749-93-0)
- 3-Amino-3-(3-hydroxyoxetan-3-yl)-N-tritylpropanamide (CAS 2198055-92-2)
- 6,6'-(Butane-1,4-diylbis(oxy))bis(2-methylquinolin-4-amine) (CAS 500283-76-1)
- 2-Acetyl-3-amino-5,5-dimethylcyclohex-2-en-1-one (CAS 23014-42-8)
- 1-(Aminooxy)propan-2-ol (CAS 32380-74-8)
- methyl 4-formylfuran-2-carboxylate (CAS 1170719-56-8)
- [[(4-Ethyl-3,5-dimethyl-1H-pyrrol-2-yl)(4-ethyl-3,5-dimethyl-2H-pyrrol-2-ylidene)methyl]methane](difluoroborane) (CAS 131083-16-4)
- 1,8-Napthalenedimethanol (CAS 2026-08-6)
- Methyl3,3-dimethyl-2-oxo-2,3-dihydro-1h-indole-6-carboxylate (CAS 1638765-21-5)
- 2-(2,4-Difluorobenzoyl)-3-methylpyridine (CAS 1187165-77-0)
- 7-Fluoro-6-hydroxybenzofuran-3(2H)-one (CAS 1198277-73-4)
- 6-PHENYLPYRAZINE-2-CARBOXYLIC ACID (CAS 13534-76-4)
- Hexapeptide-11 (CAS 100684-36-4)
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