Riboflavin Impurity 25 CAS CATO-C4X-181925
| CAS No. | CATO-C4X-181925 |
| Molecular Formula | C17H18N4O5 |
| Molecular Weight | 358.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Riboflavin Impurity 25 (CAS CATO-C4X-181925), a pharmacopoeial impurity reference standard (molecular formula C17H18N4O5, MW 358.35 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Riboflavin Impurity 25 (C17H18N4O5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 358.35 g/mol, it falls into the moderately-high-molecular-weight range. 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 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.
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 | C17H18N4O5 |
| Molecular Weight | 358.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
Related Riboflavin Standards
- Riboflavin Impurity 26 (CAS CATO-C4X-181926)
- Riboflavin Impurity 28 (CAS CATO-C4X-181928)
- Riboflavin Impurity N66 (CAS 21037-26-3)
- Riboflavin Impurity N17 (CAS 21037-25-2)
- Riboflavin Impurity 12 (CAS 64480-68-8)
- Riboflavin Impurity 19 (CAS CATO-C4X-181919)
- Riboflavin lmpurity 20 (CAS 57609-95-7)
- Riboflavin Impurity N16 (CAS 5978-87-0)
Recommended Standards
- Nimodipine Impurity 60 (CAS CATO-C4X-138560)
- N-nitroso Ciprofloxacin Impurity 36 (CAS CATO-C4X-136236)
- Tetraethyl hexane-1,6-diylbis(phosphonate) (CAS 5391-92-4)
- Nitrendipine EP Impurity A (CAS 89267-41-4)
- Amlodipine Impurity 14 (CAS 1821498-25-2)
- Butylphthalide Impurity 44 (CAS CATO-C4X-181344)
- Acyclovir Impurity 20 (CAS 111-55-7)
- 2-(2,4-Dichlorophenyl)acetamide (CAS 55954-27-3)
- 1-[3-(Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]cyclopropane-1-carboxylic acid (CAS 2553271-61-5)
- n-Butyl-2-methoxy-5-methylaniline (CAS 1019514-83-0)
- (S)-2-((1-Methylpyrrolidin-3-yl)amino)acetic acid (CAS 1353998-14-7)
- 2-Amino-3-(1H-imidazol-1-yl)propanenitrile (CAS 1249932-18-0)
- Ethyl 3,5-dimethyl-4-nitrobenzoate (CAS 3095-50-9)
- Semaglutide impurity 227 (CAS CATO-C4X-2226227)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com