Erythromycin EP Impurity K CAS 33442-56-7
Purity >90%In StockPharmacopoeial Impurity Standards
| CAS No. | 33442-56-7 |
| Molecular Formula | C36H65NO12 |
| Molecular Weight | 703.90 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Erythromycin EP Impurity K (CAS 33442-56-7) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C36H65NO12. Molecular weight: 703.90 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C36H65NO12 |
| Molecular Weight | 703.90 g/mol |
| Purity | >90% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
Related Erythromycin Standards
- Erythromycin Impurity 49 (CAS 229318-98-3)
- Erythromycin Impurity 40 (CAS CATO-C4X-100140)
- Erythromycin Impurity 41 (CAS 33275-72-8)
- Erythromycin impurity 56 (CAS CATO-C4X-100156)
- Erythromycin B rearranged derivatives (CAS CATO-C4X-100170)
- Erythromycin EP Impurity E (CAS 33396-29-1)
- Erythromycin EP Impurity D (CAS 23893-13-2)
- Erythromycin EP Impurity F (CAS 105882-69-7)
Recommended Standards
- tert-Butyl 4-(2-(4-(1-benzyl-1H-benzo[d]imidazol-2-yl)phenoxy)-1-(2-phenyl-1H-benzo[d]imidazol-1-yl)ethyl)piperidine-1-carboxylate (CAS 1440754-07-3)
- Azithromycin impurity 22 (CAS CATO-C4X-100322)
- Rapamycin Impurity 14 (CAS CATO-C4X-174614)
- Olopatadine Impurity 4 (CAS 2519517-77-0（free base）)
- Gatifloxacin Impurity 15 (CAS 1497338-46-1)
- 2-Fluoro-6-(methylamino)phenol (CAS 1243287-39-9)
- 4-Methyl-3,4-dihydroquinoxalin-2(1H)-one (CAS 67074-63-9)
- 2-(2,2-Dimethylpropanamido)-4,5-dimethoxybenzoic acid (CAS 679785-24-1)
- (1-(2-(4-Fluorophenyl)cyclopropyl)-1H-pyrazol-4-yl)methanamine hydrochloride (CAS 1956365-52-8)
- (His32,Leu34)-Neuropeptide Y (32-36) (CAS 168916-68-5)
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 13829788188 / jacky.chen@cato-chem.com