Arbidol Impurity 23 CAS CATO-C4X-112923
| CAS No. | CATO-C4X-112923 |
| Molecular Formula | C20H21BrN2O4S |
| Molecular Weight | 465.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Arbidol Impurity 23.
CATO supplies Arbidol Impurity 23 (CAS CATO-C4X-112923), a pharmacopoeial impurity reference standard (molecular formula C20H21BrN2O4S, MW 465.36 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, Arbidol Impurity 23 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 465.36 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Arbidol Impurity 23 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C20H21BrN2O4S |
| Molecular Weight | 465.36 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Arbidol Standards
- Arbidol Impurity 37 (CAS CATO-C4X-112937)
- Arbidol Impurity 4 (CAS 1130901-04-0)
- Arbidol Impurity 54 (CAS CATO-C4X-112954)
- Arbidol Impurity 58 (CAS CATO-C4X-112958)
- Arbidol Impurity 11 (CAS 958450-23-2)
- Arbidol Impurity 48 (CAS CATO-C4X-112948)
- Arbidol (CAS 131707-25-0)
- Arbidol Impurity 30 (CAS CATO-C4X-112930)
Recommended Standards
- N1-(3-chloro-4-fluorophenyl)-3-{[3-(3-chloro-4-fluoroanilino)-3-oxopropyl]dithio}propanamide (CAS 650592-32-8)
- 2-((5-(2-Bromophenyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)-N-phenylacetamide (CAS 332388-13-3)
- N1-(3-chloro-2-fluorophenyl)-3-{[3-(3-chloro-2-fluoroanilino)-3-oxopropyl]dithio}propanamide (CAS 650592-34-0)
- Delphinidin 3-O-galactoside (CAS 197250-28-5)
- Pitavastatin Impurity 88 (CAS 222306-15-2)
- Mirtazapine Impurity 27 (CAS 85141-93-1)
- Canagliflozin Impurity 92 (CAS CATO-C4X-112392)
- 7-Amino-5-fluoro-1H-indazole (CAS 1352397-94-4)
- (1-Nonyl-1H-benzo[d]imidazol-2-yl)methanol (CAS 383371-87-7)
- Ethyl 2-thioxo-5-((3-(trifluoromethyl)benzyl)thio)-1,3-dithiole-4-carboxylate (CAS 338793-29-6)
- 2-Methoxy-N-((1-methylpyrrolidin-2-yl)methyl)benzamide (CAS 91487-95-5)
- 1-(4-Chlorobenzyl)-5-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)pyridin-2(1H)-one (CAS 477858-10-9)
- 3-Methyl-1-phenylindolin-2-one (CAS 23210-22-2)
- Neuropeptide Y (13-36) (porcine) (CAS 113662-54-7)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com