Rivaroxaban Impurity 51 CAS 1918-79-2
| CAS No. | 1918-79-2 |
| Molecular Formula | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Rivaroxaban Impurity 51 (C6H6O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Rivaroxaban Impurity 51 (CAS 1918-79-2), a pharmacopoeial impurity reference standard (molecular formula C6H6O2S, MW 142.18 g/mol) used for the identification and quantification of trace impurities in APIs.
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 | C6H6O2S |
| Molecular Weight | 142.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Rivaroxaban Standards
- Rivaroxaban Impurity 85 (CAS 19213-72-0)
- Rivaroxaban Impurity 91 (CAS 7283-96-7)
- Rivaroxaban Impurity 139 (CAS 85-41-6)
- Rivaroxaban Impurity 125 (CAS 19298-14-7)
- Rivaroxaban Impurity 92 (CAS 88-13-1)
- Rivaroxaban Impurity 45 (CAS 6310-09-4)
- Rivaroxaban impurity 194 (CAS CATO-C4X-1090194)
- Rivaroxaban Impurity 114 (CAS 22353-82-8)
Recommended Standards
- Furfuryl thioformate (CAS 59020-90-5)
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- 3-(2-Methylquinolin-1-ium-1-yl)propane-1-sulfonate (CAS 51583-69-8)
- 4-tert-Butylcarbamoyl-2-chlorobenzeneboronic acid (CAS 2096336-15-9)
- 2-(Methylthio)benzo[d]oxazole-5-acetonitrile (CAS 1807100-61-3)
- 5-Chloro-3-(2,4-dichlorophenyl)-1,2-oxazole-4-carbaldehyde (CAS 1188228-87-6)
- 1-(2-Fluorophenyl)butan-1-one (CAS 21550-03-8)
- Semaglutide Impurity 15 (CAS CATO-C4X-222615)
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