Fmoc-Aib-Aib-OH CAS 139881-77-9
| CAS No. | 139881-77-9 |
| Molecular Formula | C23H26N2O5 |
| Molecular Weight | 410.46 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Fmoc-Aib-Aib-OH (CAS 139881-77-9), molecular formula C23H26N2O5 and molecular weight 410.46 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C23H26N2O5, Fmoc-Aib-Aib-OH contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 410.46 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C23H26N2O5 |
| Molecular Weight | 410.46 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 2 |
Related Fmoc Standards
- Fmoc-Ile-Gly-OH (CAS 142810-18-2)
- Fmoc-Leu-Gly-OH (CAS 82007-05-4)
- Fmoc-β-Ala-Val -OH (CAS CATO-CPTD788559)
- Fmoc-Ala-Val-OH (CAS CATO-CPTD788764)
- Fmoc-Dabmor-OH (CAS 1984002-11-0)
- Fmoc-D-HoArg-OH (CAS 1313054-69-1)
- Fmoc-Homoarg-OH (CAS 776277-76-0)
- (R)-2-(Fmoc-amino)-3-[[(allyloxy)carbonyl]amino]propanoic Acid (CAS 178924-05-5)
Recommended Standards
- α-Mangostin (CAS 6147-11-1)
- Ac-Lys(Fmoc)-OH (CAS 148101-51-3)
- 4-Amino-N-(4-(2-(pyridin-3-yl)thiazol-5-yl)pyrimidin-2-yl)benzenesulfonamide (CAS 1210769-98-4)
- H-Lys-Thr-Tyr-OH (CAS 108191-44-2)
- N-(3-Aminophenyl)-2,2,2-trifluoroacetamide (CAS 51115-93-6)
- 2-Acetyl-5-methylfuran (CAS 1193-79-9)
- 4-Methoxy-4-methylpentane-2-sulfonamide (CAS 1249522-26-6)
- 2-amino-3-cyclobutylpropanoic acid hydrochloride (CAS 681128-35-8)
- Ethyl 2-methyl-4-oxopyrrolidine-1-carboxylate (CAS 100911-10-2)
- 5-Hydrazinyl-3-methyl-1H-pyrazole-4-carbohydrazide (CAS 255715-91-4)
- Methyl 5,6-dimethoxypicolinate (CAS 324028-87-7)
- 2-(7-Chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)propan-2-ol (CAS 2387596-80-5)
- Sclareol glycol (CAS 55881-96-4)
- Semaglutide impurity 72 (CAS CATO-C4X-222672)
Why CATO?
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