Roxithromycin Impurity 20 CAS 1460313-65-8
| CAS No. | 1460313-65-8 |
| Molecular Formula | C41H76N2O16 |
| Molecular Weight | 853.05 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 Roxithromycin Impurity 20 (CAS 1460313-65-8), a pharmacopoeial impurity reference standard (molecular formula C41H76N2O16, MW 853.05 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Roxithromycin Impurity 20 is typically off-white to pale yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 853.05 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a certified reference material (CRM), Roxithromycin Impurity 20 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 | C41H76N2O16 |
| Molecular Weight | 853.05 g/mol |
| Purity | 97%+ |
| 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 |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Nitrogen Atoms | 2 |
Related Roxithromycin Standards
- Roxithromycin EP Impurity K (CAS CATO-C4X-130312)
- Roxithromycin Impurity 19 (CAS 1460313-73-8)
- Roxithromycin impurity 27 (CAS CATO-C4X-130327)
- Roxithromycin Impurity 25 (CAS 1094780-37-6)
- Roxithromycin impurity 30 (CAS CATO-C4X-130330)
- Roxithromycin impurity 28 (CAS CATO-C4X-130328)
- Roxithromycin-d7 (CAS CATO-C4X-130322)
- Roxithromycin-d7 (CAS CATO-CCAD300664)
Recommended Standards
- 9,9-Bis[4-[di(2-naphthyl)amino]phenyl]fluorene (CAS 916061-87-5)
- Carfilzomib Impurity 79 (CAS CATO-C4X-102279)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
- Teneligliptin impurity 34 (CAS CATO-C4X-176034)
- Captopril EP Impurity F (CAS 63250-36-2)
- Dronedarone Impurity 5 (CAS 141627-42-1)
- Vincamine Impurity 4 (CAS 28152-73-0)
- 1,8-Diphenoxyanthracene-9,10-dione (CAS 82-17-7)
- 1H-Pyrrolo[2,3-c]pyridine, 2-methyl-, monohydrochloride (CAS 65645-60-5)
- Ethyl 4-bromo-2-fluoro-6-methoxybenzoate (CAS 1823913-07-0)
- N-(2-Chloro-6-methylphenyl)-2-(pyrrolidin-1-yl)acetamide succinate (CAS 109734-19-2)
- 5-Bromo-3,3-dimethyl-2,3-dihydro-1H-pyrrolo[3,2-b]pyridine (CAS 1649454-39-6)
- Dapagliflozin Impurity 53 (CAS CATO-C4X-113853)
- Liraglutide(8-31)TFA Salt (CAS CATO-C4X-19922)
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