(3aR,4S,9bS)-9-Chloro-6-methoxy-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid CAS 956189-13-2
| CAS No. | 956189-13-2 |
| Molecular Formula | C14H14ClNO3 |
| Molecular Weight | 279.72 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies (3aR,4S,9bS)-9-Chloro-6-methoxy-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid (CAS 956189-13-2), a certified reference material (molecular formula C14H14ClNO3, MW 279.72 g/mol) for analytical method development and quality control.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, (3aR,4S,9bS)-9-Chloro-6-methoxy-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-4-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 279.72 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C14H14ClNO3 |
| Molecular Weight | 279.72 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, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Recommended Standards
- (2,6-Dibromophenyl)boronic acid (CAS 851756-50-8)
- (4S,4'S)-2,2'-(4-Chloropyridine-2,6-diyl)bis(4-methyl-4,5-dihydrooxazole) (CAS 860151-77-5)
- Ethyl 2-(6-chloropyridin-2-yl)-1-ethyl-1H-imidazole-5-carboxylate (CAS 1956380-22-5)
- (E)-{[4-(4-chlorophenyl)-2,6-dioxocyclohexyl]methylidene}(methyl)oxidoazanium (CAS 338399-41-0)
- L-threo-Phenylserine (CAS 6254-48-4)
- 6-(4-Chlorophenyl)-1-[(4-methylphenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carbonitrile (CAS 339109-91-0)
- (5E)-2-Mercapto-5-(4-nitrobenzylidene)-3-phenyl-3,5-dihydro-4H-imidazol-4-one (CAS 53514-58-2)
- 2-((N-ethyl-4-methylphenyl)sulfonamido)benzoic acid (CAS 70176-69-1)
- Methyl 3-amino-3-(3-hydroxyphenyl)propanoate (CAS 1037313-22-6)
- 2-(Methylamino)-N-(5-methylthiazol-2-yl)acetamide (CAS 1016824-89-7)
- (S)-(2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)methanamine hydrochloride (CAS 23191-07-3)
- Ethyl 3-(3,4,5-trifluorophenyl)propiolate (CAS 1417507-08-4)
- Tin selenide (CAS 1315-06-6)
- Semaglutide Impurity 5 (CAS 23406-82-8)
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