Peptide Impurity 26 CAS 1350456-66-4
| CAS No. | 1350456-66-4 |
| Molecular Formula | C35H43N7O11 |
| Molecular Weight | 737.76 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Peptide Impurity 26 is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Peptide Impurity 26 (CAS 1350456-66-4) is a certified pharmaceutical impurity reference standard with the molecular formula C35H43N7O11 and a molecular weight of 737.76 g/mol.
Based on its molecular formula C35H43N7O11, Peptide Impurity 26 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 737.76 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C35H43N7O11 |
| Molecular Weight | 737.76 g/mol |
| Purity | ≥98% |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 7 |
Related Peptide Standards
- Peptide Impurity 27 (CAS 1350456-68-6)
- Peptide Impurity 28 (CAS 1350456-64-2)
- Peptide Impurity 13 (CAS CATO-CPTD788813)
- Peptide T (CAS 106362-32-7)
- Peptide Fmoc-Thi-Thi-OH (CAS CATO-CPTD788552)
- Peptide 6A (H-6905.0005) (CAS 73549-32-3)
- Peptide Impurity 41 (CAS CATO-CPTD788841)
- Peptide Impurity 24 (CAS CATO-CPTD788824)
Recommended Standards
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- Tris(triisopropylphosphine)palladium (CAS 52359-15-6)
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- 2-[2-(4-methyl-1,3-thiazol-5-yl)-1h-1,3-benzodiazol-1-yl]acetic acid (CAS 1094744-10-1)
- Ethyl 2-(2H-chromen-3-yl)-4-methylthiazole-5-carboxylate (CAS 1291490-33-9)
- D-Ile12-Tirzepatide (CAS CATO-CPTD788921)
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