H-Val-Ala-Ala-Phe-OH (H-5255.0250) CAS 21957-32-4
| CAS No. | 21957-32-4 |
| Molecular Formula | C20H30N4O5 |
| Molecular Weight | 406.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 406.48 g/mol gives H-Val-Ala-Ala-Phe-OH (H-5255.0250) distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies H-Val-Ala-Ala-Phe-OH (H-5255.0250) (CAS 21957-32-4), a certified reference material (molecular formula C20H30N4O5, MW 406.48 g/mol) for analytical method development and quality control.
The molecular framework of H-Val-Ala-Ala-Phe-OH (H-5255.0250) (C20H30N4O5) 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.
As a certified reference material (CRM), H-Val-Ala-Ala-Phe-OH (H-5255.0250) meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C20H30N4O5 |
| Molecular Weight | 406.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 4 |
Recommended Standards
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Why CATO?
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