Fmoc-Asp(OtBu)-OH CAS 71989-14-5
| CAS No. | 71989-14-5 |
| Molecular Formula | C23H25NO6 |
| Molecular Weight | 411.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 411.45 g/mol gives Fmoc-Asp(OtBu)-OH distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Fmoc-Asp(OtBu)-OH (CAS 71989-14-5), a certified reference material (molecular formula C23H25NO6, MW 411.45 g/mol) for analytical method development and quality control.
The molecular framework of Fmoc-Asp(OtBu)-OH (C23H25NO6) 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 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.
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 | C23H25NO6 |
| Molecular Weight | 411.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 1 |
Related Fmoc Standards
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- Fmoc-n-(tert-butyloxycarbonylmethyl)-glycine (CAS 141743-16-0)
- FMoc-Cit-OMe (CAS 1820581-58-5)
- Fmoc-D-Asu-OH (CAS 218457-78-4)
- Fmoc-D-Asp(OtBu)-OH (CAS 112883-39-3)
- Fmoc-D-Homocit-OH (CAS 201485-38-3)
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Recommended Standards
- Orforglipron impurity 65 (CAS CATO-C4X-323465)
- Orforglipron Impurity 51 (CAS CATO-C4X-323451)
- Orforglipron intermediates 5 (CAS 2212021-83-3)
- Boc-Asp(OFm)-OH (CAS 117014-32-1)
- 7-Bromo-2-methyl-1,2,3,4-tetrahydroisoquinoline-1,3-dione (CAS 1341602-23-0)
- 4-[(Morpholinothio)thioxomethyl]morpholine (CAS 13752-51-7)
- 1-Boc-3-amino-3-cyanopyrrolidine (CAS 871115-54-7)
- Tert-butyl 4-(((3-aminopyridin-2-yl)oxy)methyl)piperidine-1-carboxylate (CAS 1286274-50-7)
- N-[(4-Methylphenyl)methyl]-6-[4-(5-{[(4-methylphenyl)methyl]carbamoyl}pentyl)piperazin-1-yl]hexanamide (CAS 1424350-54-8)
- 2-Hydroxy-4-(3-nitrobenzenesulfonamido)benzoic acid (CAS 326610-63-3)
- 6283-74-5 D7XNF76O0K O,O-Diacetyl tartaric acid anhydride (3R-trans)-Dihydro-2,5-dioxofuran-3,4-diyl diacetate EINECS 228-502-7 UNII-D7XNF76O0K (CAS 6283-74-5)
- 3-methoxynaphthalen-1-ol (CAS 57404-85-0)
- 4,4,5,5-Tetramethyl-2-[10-(1-naphthyl)anthracen-9-yl]-1,3,2-dioxaborolane (CAS 1149804-35-2)
- Semaglutide impurity 199 (CAS CATO-C4X-2226199)
Why CATO?
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