Alanyl Glutamine Impurity 31 CAS 656221-79-3
| CAS No. | 656221-79-3 |
| Molecular Formula | C8H15N3O4 |
| Molecular Weight | 217.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Alanyl Glutamine Impurity 31 (CAS 656221-79-3), a pharmacopoeial impurity reference standard (molecular formula C8H15N3O4, MW 217.22 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C8H15N3O4, Alanyl Glutamine Impurity 31 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 217.22 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.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C8H15N3O4 |
| Molecular Weight | 217.22 g/mol |
| Appearance | White to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 3 |
Related Alanyl Standards
- L-Alanyl-L-glutamine (CAS 39537-23-0)
- L-Alanyl-D-glutamine (CAS 281660-34-2)
- D-Alanyl-L-glutamine (CAS 205252-36-4)
- Alanyl Glutamine Impurity 3 (CAS CATO-C4X-19743)
- Alanyl Glutamine Impurity 33 (CAS 21064-18-6)
- Alanyl Glutamine Impurity 4 (CAS CATO-C4X-19744)
- Alanyl Glutamine Impurity 7 (CAS CATO-C4X-19747)
- Alanyl Glutamine Impurity 28 (CAS CATO-C4X-197428)
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- 1-(Oxan-4-yl)propan-2-one (CAS 86428-61-7)
- Bradykinin-Like Neuropeptide (Aplysia californica) (H-1654.0001) (CAS 165174-60-7)
Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com