Etizolam Impurity 21 CAS 50508-58-2
| CAS No. | 50508-58-2 |
| Molecular Formula | C13H13NOS |
| Molecular Weight | 231.31 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Etizolam Impurity 21 (CAS 50508-58-2), a pharmacopoeial impurity reference standard (molecular formula C13H13NOS, MW 231.31 g/mol) used for the identification and quantification of trace impurities in APIs.
Etizolam Impurity 21 (C13H13NOS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; 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 manufactures Etizolam 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.
Physical & Chemical Properties
| Molecular Formula | C13H13NOS |
| Molecular Weight | 231.31 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Etizolam Standards
- Etizolam Impurity 13 (CAS 247188-22-3)
- Etizolam Impurity 5 (CAS CATO-C4X-35095)
- Etizolam Impurity 4 (CAS 110753-14-5)
- Etizolam Impurity C62 (CAS 16437-59-5)
- Etizolam Impurity 14 (CAS 40054-57-7)
- Etizolam Impurity 12 (CAS 67727-22-4)
- Etizolam Impurity 7 (CAS 91663-72-8)
- Etizolam Impurity 15 (CAS 51687-58-2)
Recommended Standards
- 90924-54-2 Ethyl 5-(thiophen-2-yl)-1,2-oxazole-3-carboxylate DTXSID60372553 (CAS 90924-54-2)
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- O-(Naphthalen-2-yl) dimethylcarbamothioate (CAS 2951-24-8)
- 4-((4,6-Dimethylpyrimidin-2-yl)thio)aniline (CAS 102243-12-9)
- Ornidazole Impurity 100 (CAS CATO-C4X-1331100)
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- Bosentan Impurity 14 (CAS 1355251-10-3)
- Naphthalen-2-yl propionate (CAS 13080-43-8)
- N-[2-(2,4-Dichlorophenyl)-2-hydroxyethyl]formamide (CAS 71162-52-2)
- 3-[3-fluoro-4-(pyridin-3-yloxy)phenyl]prop-2-enoic acid (CAS 1097101-47-7)
- 1-(1-benzothiophen-2-yl)ethan-1-amine hydrochloride (CAS 1803593-05-6)
- Tert-butyl 3-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophen-2-yl)pyrrolidine-1-carboxylate (CAS 2223006-28-6)
- 7-Bromo-6-fluoro-1H-indole (CAS 1000339-62-7)
- Steroidogenesis-Activator Polypeptide (rat) (H-8855.0500) (CAS 108563-23-1)
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