Fudosteine Impurity 25 CAS 121234-18-2
| CAS No. | 121234-18-2 |
| Molecular Formula | C21H22O7P2 |
| Molecular Weight | 448.34 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.
CATO supplies Fudosteine Impurity 25 (CAS 121234-18-2), a pharmacopoeial impurity reference standard (molecular formula C21H22O7P2, MW 448.34 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, a phosphate ester group, a hydroxyl group, an ether linkage, Fudosteine Impurity 25 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 448.34 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C21H22O7P2 |
| Molecular Weight | 448.34 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
Related Fudosteine Standards
- Fudosteine Impurity 85 (CAS CATO-C4X-144785)
- Fudosteine Impurity 54 (CAS CATO-C4X-144754)
- Fudosteine impurity 76 (CAS CATO-C4X-144776)
- Fudosteine Impurity 53 (CAS CATO-C4X-144753)
- Fudosteine Impurity 62 (CAS CATO-C4X-144762)
- Fudosteine Impurity 86 (CAS CATO-C4X-144786)
- Fudosteine Impurity 33 (CAS CATO-C4X-144733)
- Fudosteine Impurity 35 (CAS CATO-C4X-144735)
Recommended Standards
- 6-(Phenylsulfonyl)-5-(trifluoromethyl)-2-(3-(trifluoromethyl)phenyl)pyridazin-3(2H)-one (CAS 866131-11-5)
- 11-([1,1'-Biphenyl]-4-yl)-5-bromo-11H-benzo[a]carbazole (CAS 1210469-50-3)
- 4-(((4-(4-Bromophenyl)-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)methyl)benzonitrile (CAS 477333-08-7)
- 1-{[2-(4-bromophenoxy)-1,3-thiazol-5-yl]methyl}-4-(4-fluorophenyl)piperazine (CAS 439097-13-9)
- Semaglutide (CAS CATO-C4X-2226105)
- Edoxaban Impurity 64 (CAS CATO-C4X-106364)
- Artemisinin Impurity 3 (CAS CATO-C4X-20123)
- 2-(tert-Butoxy)-4-cyclopropoxy-5-ethylpyridine (CAS 1243400-78-3)
- (E)-3-((4-methoxyphenyl)amino)-1-(naphthalen-2-yl)prop-2-en-1-one (CAS 339014-55-0)
- Z-Glu(OBzl)-ONp (CAS 49689-66-9)
- 5-Ethyl-4-(1-methoxypentan-2-yl)-1H-pyrazol-3-amine (CAS 647854-13-5)
- 3-Bromo-1-(pyridin-2-yl)pyrrolidin-2-one (CAS 178946-27-5)
- 1-Bromo-3-chloro-2,4-dimethoxybenzene (CAS 1228956-93-1)
- Semaglutide Impurity 6 (CAS 62-57-7)
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