Fmoc-L-Lys[Oct-(otBu)-Glu-(otBu)-AEEA-AEEA]-OH CAS 1662688-20-1
| CAS No. | 1662688-20-1 |
| Molecular Formula | C64H101N5O16 |
| Molecular Weight | 1196.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Fmoc-L-Lys[Oct-(otBu)-Glu-(otBu)-AEEA-AEEA]-OH (CAS 1662688-20-1), molecular formula C64H101N5O16 and molecular weight 1196.51 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C64H101N5O16, Fmoc-L-Lys[Oct-(otBu)-Glu-(otBu)-AEEA-AEEA]-OH contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 1196.51 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).
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 | C64H101N5O16 |
| Molecular Weight | 1196.51 g/mol |
| 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 5 |
Related Fmoc Standards
- Fmoc-N-PEG20-acid (CAS 1952360-93-8)
- 145082-23-1 (Fmoc-Glu70,Ala71?72,Lys74)-C3a (70-77) MFCD00236899 (CAS 145082-23-1)
- Fmoc-D.LyS[AEEA-y-D.Glu(OtBu)-C20-0tBu-OH (CAS CATO-C4X-2226173)
- Fmoc-Arg(Pbf)-Arg(Pbf)-OH (CAS 1589085-71-1)
- Fmoc-[D-Arg(Pbf)]2-OH (CAS CATO-CPTD788578)
- Fmoc-PEG3-Ala-Ala-Asn(Trt)-PAB (CAS 2055042-69-6)
- Fmoc-Phe-Lys(Trt)-PAB-PNP (CAS 1116086-09-9)
- Fmoc-N-PEG24-acid (CAS 2170484-59-8)
Recommended Standards
- Semaglutide impurity 25 (CAS CATO-C4X-222625)
- Cholesteryl-TEG Phosphoramidite (CAS 873435-29-1)
- Semaglutide impurity 24 (CAS CATO-C4X-222624)
- Ciclosporin Impurity 19 (CAS CATO-C4X-199819)
- 3,6-Diethyl-N-(pentan-3-yl)pyrazin-2-amine (CAS 622834-90-6)
- Ald-Ph-amido-C2-PEG3-NH-Boc (CAS 1807540-87-9)
- 2-Methoxy-N-propylaniline (CAS 139944-56-2)
- 2,6-dichloropyridine-3-sulfonyl chloride (CAS 239810-43-6)
- Ethyl 4-hydroxypyrimidine-5-carboxylate (CAS 71133-20-5)
- Amino-PEG4-hydrazide-Boc (CAS 1263047-17-1)
- 4-(4-Methoxyphenyl)-6-(4-methylpiperazin-1-yl)-2-(pyridin-2-yl)pyrimidine-5-carbonitrile (CAS 338394-98-2)
- 2-(4-ethylphenyl)morpholine (CAS 1017417-84-3)
- (R)-tert-Butyl 3-((6-ethoxypyrimidin-4-yl)amino)pyrrolidine-1-carboxylate (CAS 1354020-91-9)
- Peptide Impurity 28 (CAS 1350456-64-2)
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