Cytarabine Impurity 21 CAS CATO-C4X-200521
| CAS No. | CATO-C4X-200521 |
| Molecular Formula | C9H13N3O5 |
| Molecular Weight | 243.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Cytarabine Impurity 21 (CAS CATO-C4X-200521), a pharmacopoeial impurity reference standard (molecular formula C9H13N3O5, MW 243.22 g/mol) used for the identification and quantification of trace impurities in APIs.
Cytarabine Impurity 21 (C9H13N3O5) contains an amino-acid-derived structure, an amide 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), Cytarabine Impurity 21 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 | C9H13N3O5 |
| Molecular Weight | 243.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Cytarabine Standards
- Cytarabine (CAS 147-94-4)
- Cytarabine EP Impurity E (CAS 65-46-3)
- Cytarabine Impurity 20 (CAS CATO-C4X-200520)
- Cytarabine Impurity 22 (CAS CATO-C4X-200522)
- Cytarabine Impurity 9 (CAS 7428-39-9)
- Cytarabine EP Impurity A (CAS 3083-77-0)
- Cytarabine-5,6-d2 (CAS 40632-26-6)
- Cytarabine Impurity 27 (CAS CATO-C4X-200527)
Recommended Standards
- Cyanophos (CAS 2636-26-2)
- Taribavirin (CAS 119567-79-2)
- 3-(3-Cyclopropyl-5-(trifluoromethyl)-1h-pyrazol-1-yl)-2-methylpropanenitrile (CAS 1006319-21-6)
- Azacitidine Impurity 63 (CAS 218452-08-5)
- Amoxicillin Impurity 96 (CAS 2088960-43-2)
- Glucose Impurity 44 (CAS CATO-C4X-209544)
- Nafamostat Impurity 34 (CAS 19307-13-2)
- 1-((2,4-Dichlorobenzyl)amino)propan-2-ol (CAS 412308-24-8)
- N-(2-(3-Methylisoxazol-5-yl)ethyl)adamantane-1-carboxamide (CAS 1396809-09-8)
- 3-Fluoro-3-(3-methylphenyl)propiophenone (CAS 898790-67-5)
- (2-Methyl-1,3-dioxolan-2-yl)methyl 3-oxobutanoate (CAS 86780-80-5)
- 1-(4-(2-(1H-Imidazol-1-yl)ethyl)piperazin-1-yl)-3-phenylprop-2-en-1-one (CAS 1396891-01-2)
- 1-(4-Ethoxyphenyl)propan-1-amine (CAS 925608-01-1)
- Insulin Degludec Impurity 15 (CAS CATO-C4X-215715)
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