(S)-5-(((9H-fluoren-9-yl)methoxy)carbonyl)-5-azaspiro[2.3]Hexane-4-carboxylic acid CAS 2387568-16-1
| CAS No. | 2387568-16-1 |
| Molecular Formula | C21H19NO4 |
| Molecular Weight | 349.38 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.
(S)-5-(((9H-fluoren-9-yl)methoxy)carbonyl)-5-azaspiro[2.3]Hexane-4-carboxylic acid (CAS 2387568-16-1), molecular formula C21H19NO4 and molecular weight 349.38 g/mol, is a CATO reference standard with documented purity and traceability.
(S)-5-(((9H-fluoren-9-yl)methoxy)carbonyl)-5-azaspiro[2.3]Hexane-4-carboxylic acid (C21H19NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H19NO4 |
| Molecular Weight | 349.38 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Nitrogen Atoms | 1 |
Recommended Standards
- (S)-2-((Diphenylphosphoryl)amino)-4-(methylthio)butanoic acid (CAS 62056-82-0)
- (S)-Naphthalen-2-yl 2-(((benzyloxy)carbonyl)amino)propanoate (CAS 60894-49-7)
- (S)-2-(((Benzyloxy)carbonyl)amino)-4-(cyclohexyloxy)-4-oxobutanoic acid (CAS 211797-21-6)
- 1-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)cyclopent-3-ene-1-carboxylic acid (CAS 2219369-66-9)
- ((4S,5R)-2-(Ethoxycarbonyl)-4,5-dimethyl-5-(trifluoromethyl)-4,5-dihydrofuran-3-yl)boronic acid (CAS 2649471-18-9)
- 5-Bromo-N-(1-(tert-butylamino)-1-oxopropan-2-yl)thiophene-2-carboxamide (CAS 1252107-67-7)
- 2-Amino-2-(4-fluorophenyl)ethan-1-ol (CAS 140373-17-7)
- 1-(2,3-DIchlorophenyl)biguanide hydrochloride (CAS 175205-08-0)
- 2-(Benzyloxy)-3-chlorobenzaldehyde (CAS 80352-52-9)
- 1-[(4-Chlorophenyl)methyl]-5-oxopyrrolidine-2-carboxylic acid (CAS 116404-24-1)
- PBDE 175 (CAS 446255-22-7)
- (2-Amino-3,5-difluoropyridin-4-yl)methanol (CAS 2803703-95-7)
- Lenalidomide Impurity 66 (CAS CATO-C4X-190366)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
Why CATO?
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