(S)-a-(Fmoc-amino)-3,5-difluorobenzenebutanoic acid CAS 1260591-27-2
| CAS No. | 1260591-27-2 |
| Molecular Formula | C25H21F2NO4 |
| Molecular Weight | 437.44 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.
CATO supplies (S)-a-(Fmoc-amino)-3,5-difluorobenzenebutanoic acid (CAS 1260591-27-2), a certified reference material (molecular formula C25H21F2NO4, MW 437.44 g/mol) for analytical method development and quality control.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, (S)-a-(Fmoc-amino)-3,5-difluorobenzenebutanoic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 437.44 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.
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 | C25H21F2NO4 |
| Molecular Weight | 437.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Recommended Standards
- (R)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-2-(2,5-difluorobenzyl)propanoic acid (CAS 1260591-24-9)
- (S)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-2-(3,4-difluorobenzyl)propanoic acid (CAS 1260591-35-2)
- (S)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-2-(3,5-difluorobenzyl)propanoic acid (CAS 1260590-68-8)
- (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-(2,6-difluorophenyl)butanoic acid (CAS 1260594-30-6)
- methyl 7-chloro-4-fluoro-1H-indazole-5-carboxylate (CAS 2489544-28-5)
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