Erythromycin Impurity 49 CAS 229318-98-3
| CAS No. | 229318-98-3 |
| Molecular Formula | C35H63NO13 |
| Molecular Weight | 705.87 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Erythromycin Impurity 49 (CAS 229318-98-3), a pharmacopoeial impurity reference standard (molecular formula C35H63NO13, MW 705.87 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Erythromycin Impurity 49 (C35H63NO13) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C35H63NO13 |
| Molecular Weight | 705.87 g/mol |
| Purity | 97%+ |
| 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.) | 2022 |
| Nitrogen Atoms | 1 |
Related Erythromycin Standards
- Erythromycin EP Impurity K (CAS 33442-56-7)
- 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)
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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