(2R,4S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid CAS 139262-20-7
| CAS No. | 139262-20-7 |
| Molecular Formula | C20H19NO5 |
| Molecular Weight | 353.37 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 (2R,4S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid.
(2R,4S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid (CAS 139262-20-7), molecular formula C20H19NO5 and molecular weight 353.37 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, (2R,4S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 353.37 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.
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 | C20H19NO5 |
| Molecular Weight | 353.37 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 1 |
Recommended Standards
- Methyl 2-[(E)-2-(dimethylamino)vinyl]-6-(2-furylmethyl)-5-oxo-5,6-dihydro-1,6-naphthyridine-3-carboxylate (CAS 1374510-90-3)
- 4-([3,2':6',3''-terpyridin]-4'-yl)benzoic acid (CAS 1415258-35-3)
- 4-([4,2':6',4''-Terpyridin]-4'-yl)benzoic acid (CAS 1370206-12-4)
- (S,E)-1-(((4-(Phenyldiazenyl)benzyl)oxy)carbonyl)pyrrolidine-2-carboxylic acid (CAS 1423017-97-3)
- 2-Chloro-N-ethylbenzamide (CAS 66896-65-9)
- 4-(3-Bromothiophen-2-yl)-2-(3,5-dimethyl-1H-pyrazol-1-yl)thiazole (CAS 955976-79-1)
- 4-Chloro-6-methylpyrimidine-5-carbonitrile (CAS 425395-73-9)
- Terbutaline Sulphate Impurity 50 (CAS 50841-46-8)
- 1-((7AS)-8,8-dimethyl-1,1-dioxidohexahydro-4H-3a,6-methanobenzo[d]isothiazol-7-yl)prop-2-en-1-one (CAS 119944-89-7)
- 1-(Methoxymethyl)-1H-pyrrole-2-carboxylic acid (CAS 172805-62-8)
- (2-bromo-3-methylphenyl)methanamine hydrochloride (CAS 1798017-37-4)
- 4-(6-Isopropyl-1H-benzo[d]imidazol-2-yl)aniline (CAS 303099-05-0)
- [1-(4-fluorobenzyl)piperidin-4-yl]methanol,HCL (CAS 174561-04-7)
- Insulin Degludec Impurity 17 (CAS CATO-C4X-215717)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com