Fmoc-[D??]Leu-OH CAS 1190594-22-9
| CAS No. | 1190594-22-9 |
| Molecular Formula | C21H23NO4 |
| Molecular Weight | 363.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Fmoc-[D??]Leu-OH (C21H23NO4) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Fmoc-[D??]Leu-OH (CAS 1190594-22-9), molecular formula C21H23NO4 and molecular weight 363.47 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C21H23NO4 |
| Molecular Weight | 363.47 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 1 |
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- 2,4-Dichloro-3-cyanopyridine (CAS 180995-12-4)
- 4-(1-Ethyl-1H-pyrrol-2-yl)-2,4-dioxobutanoic acid (CAS 251924-37-5)
- 4-Methyl-N-(4-nitrophenyl)benzamide (CAS 33667-88-8)
- Potassium Ethyltrifluoroborate (CAS 44248-07-9)
- 2,4-Diamino-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid (CAS 1337881-83-0)
- Ethyl 2-(3-fluorophenyl)-2-oxoacetate (CAS 110193-59-4)
- (2R)-2-amino-3-(3-tert-butoxycarbonylbenzimidazol-5-yl)propanoic acid (CAS 2387566-49-4)
- Levocabastine impurity 17 (CAS CATO-C4X-228917)
- D-Ala28-Tirzepatide (CAS CATO-CPTD788906)
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