Sapropterin Impurity 4 CAS CATO-C4X-27664
| CAS No. | CATO-C4X-27664 |
| Molecular Formula | C9H9N5O3 |
| Molecular Weight | 235.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Sapropterin Impurity 4 (CAS CATO-C4X-27664) is a certified pharmaceutical impurity reference standard with the molecular formula C9H9N5O3 and a molecular weight of 235.20 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Sapropterin Impurity 4 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 235.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C9H9N5O3 |
| Molecular Weight | 235.20 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Sapropterin Standards
- Sapropterin (CAS 62989-33-7)
- Sapropterin Impurity 3 (CAS CATO-C4X-27663)
- Sapropterin D3 (CAS CATO-C4X-31026)
- Sapropterin impurity 3 (CAS CATO-C4X-31023)
- Sapropterin Impurity 1 (CAS 1131-35-7)
- Sapropterin Impurity 2 (CAS CATO-C4X-27662)
- Sapropterin Impurity 5 (CAS 17838-80-1)
- Sapropterin Impurity 7 (CAS 6228-40-6)
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