Arbidol Impurity 21 CAS 25900-97-4
| CAS No. | 25900-97-4 |
| Molecular Formula | C22H26N2O3S |
| Molecular Weight | 398.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Arbidol Impurity 21 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
As a process- or degradation-related impurity, Arbidol Impurity 21 (CAS 25900-97-4, C22H26N2O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Arbidol Impurity 21 (C22H26N2O3S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C22H26N2O3S |
| Molecular Weight | 398.52 g/mol |
| Purity | >95% |
| 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 |
| CAS Registry Year (est.) | 1964 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Arbidol Standards
- Arbidol Impurity 57 (CAS CATO-C4X-112957)
- Arbidol Impurity 46 (CAS 149246-36-6)
- Arbidol Impurity 56 (CAS CATO-C4X-112956)
- Arbidol Impurity 15 (CAS CATO-C4X-112915)
- Arbidol Impurity 2 (CAS 131707-24-9)
- Arbidol Impurity 26 (CAS CATO-C4X-112926)
- Arbidol Impurity 29 (CAS CATO-C4X-112929)
- Arbidol Impurity 51 (CAS 2062260-55-1)
Recommended Standards
- N-(1-Benzyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)cyclohexanesulfonamide (CAS 941992-15-0)
- Tirofiban Impurity 68 (CAS CATO-C4X-125468)
- Methyl 2-((2-(methylthio)benzo[4,5]thieno[3,2-d]pyrimidin-4-yl)thio)benzoate (CAS 478029-96-8)
- Bis(4-tert-butylcyclohexyl)peroxydicarbonate (CAS 15520-11-3)
- Perindopril Impurity 41 (CAS CATO-C4X-125241)
- Axitinib Impurity 33 (CAS CATO-C4X-107133)
- Voriconazole Impurity 48 (CAS 1403893-61-7)
- Methyl 3-(4-chloro-3-nitrophenyl)acrylate (CAS 20884-03-1)
- 5-(1-Ethyl-3-methyl-1H-pyrazol-5-yl)-1-methyl-1,2,3,6-tetrahydropyridine (CAS 622403-70-7)
- Ethyl (E)-3-(3-chloro-4-methylphenyl)acrylate (CAS 92712-56-6)
- 4-Allyl-5-((3-chloro-4-fluorophenoxy)methyl)-4H-1,2,4-triazole-3-thiol (CAS 861236-57-9)
- 1-(2-Hydroxy-4-((2-methylbut-3-yn-2-yl)oxy)phenyl)ethan-1-one (CAS 30414-96-1)
- 2-({2-[4-(Benzylamino)-4-oxobutanoyl]hydrazino}carbonyl)cyclohexanecarboxylic acid (CAS 914204-20-9)
- Tirzepatide Impurity 49 (CAS CATO-C4X-324049)
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