Spiramycin EP Impurity B CAS CATO-C4X-23252
| CAS No. | CATO-C4X-23252 |
| Molecular Formula | C45H80N2O14 |
| Molecular Weight | 872.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Spiramycin EP Impurity B is typically off-white to pale yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 872.56 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Spiramycin EP Impurity B (CAS CATO-C4X-23252), a pharmacopoeial impurity reference standard (molecular formula C45H80N2O14, MW 872.56 g/mol) used for the identification and quantification of trace impurities in APIs.
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), Spiramycin EP Impurity B 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 | C45H80N2O14 |
| Molecular Weight | 872.56 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Spiramycin Standards
- Spiramycin I (CAS CATO-C4X-2325)
- Spiramycin EP Impurity C (CAS CATO-C4X-23253)
- Spiramycin EP Impurity D (CAS CATO-C4X-23254)
- Spiramycin EP Impurity G (CAS CATO-C4X-23256)
- Spiramycin EP Impurity D (CAS 87708-39-2)
- Spiramycin III (CAS 24916-52-7)
- Spiramycin EP Impurity B (CAS 249930-66-3)
- Spiramycin (CAS 8025-81-8)
Recommended Standards
- Ceftazidime impurity 124 (CAS CATO-C4X-1212124)
- (SP-4-1)-[1,3-Bis[2,6-bis(1-ethylpropyl)phenyl]-4,5-dichloro-1,3-dihydro-2H-imidazol-2-ylidene]dichloro(3-chloropyridine-κN)palladium (CAS 1435347-24-2)
- (OC-6-31)-[2,6-Bis[[bis(1,1-dimethylethyl)phosphino-κP]methyl]pyridine-κN]triiodomolybdenum (CAS 2279899-25-9)
- Pinocembrin 7-O-[3-O-galloyl-4,6-hexahydroxydiphenoyl]-β-D-glucoside (CAS 205370-59-8)
- Varenicline Nitroso Impurity 36 (CAS CATO-C4X-196236)
- Vortioxetine Impurity 87 (CAS 34570-17-7)
- Abemaciclib Impurity 160 (CAS CATO-C4X-2937160)
- tert-Butyl 5,6-dimethoxy-3-oxo-2,3-dihydrospiro[indene-1,4'-piperidine]-1'-carboxylate (CAS 948033-75-8)
- (2,4-Dihydroxyphenyl)(3,4-dihydroxyphenyl)methanone (CAS 61445-50-9)
- Methyl 5-(4-ethylphenyl)oxazole-4-carboxylate (CAS 89204-98-8)
- N,5-Dimethyl-1H-pyrazol-3-amine (CAS 73844-02-7)
- 6-Fluoroimidazo[1,2-a]pyridine-2-carboxylic acid (CAS 367900-94-5)
- 3-(4-Methoxyphenyl)-6-(pyrrolidin-1-yl)pyridazino[4,3-c]isoquinoline (CAS 96825-90-0)
- Fragment-[9-31]-Semaglutide (CAS CATO-C4X-2226181)
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