Azithromycin Impurity 44 CAS 2365312-76-9
| CAS No. | 2365312-76-9 |
| Molecular Formula | C30H60N2O10 |
| Molecular Weight | 608.80 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Azithromycin Impurity 44 (CAS 2365312-76-9), a pharmacopoeial impurity reference standard (molecular formula C30H60N2O10, MW 608.80 g/mol) used for the identification and quantification of trace impurities in APIs.
Azithromycin Impurity 44 (C30H60N2O10) contains an amide group, a carboxylic acid 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C30H60N2O10 |
| Molecular Weight | 608.80 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 | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1999 |
| Nitrogen Atoms | 2 |
Related Azithromycin Standards
- Azithromycin EP Impurity J (CAS 117693-41-1)
- Azithromycin Impurity 4 (CAS CATO-C4X-10034)
- Azithromycin impurity 22 (CAS CATO-C4X-100322)
- Azithromycin Impurity 33 (CAS CATO-C4X-100333)
- Azithromycin Impurity 38 (CAS CATO-C4X-100338)
- Azithromycin impurity 62 (CAS 857078-26-3)
- Azithromycin EP Impurity N (CAS 612069-25-7)
- Azithromycin Impurity 34 (CAS CATO-C4X-100334)
Recommended Standards
- Paliperidone Impurity 41 (CAS CATO-C4X-172441)
- N,N'-([4,4'-Bipiperidine]-1,1'-diylbis(ethane-2,1-diyl))bis(acridin-9-amine) (CAS 119643-88-8)
- 4,4',4'',4'''-([2,2'-Bi(1,3-dithiolylidene)]-4,4',5,5'-tetrayl)tetrabenzonitrile (CAS 1356336-67-8)
- Atrasentan Impurity 108 (CAS 1059052-13-9)
- Imatinib Impurity 91 (CAS CATO-C4X-106891)
- Vortioxetine Impurity 41 (CAS 2476761-84-7)
- Revefenacin impurity 74 (CAS CATO-C4X-203174)
- 1,5-Dimethyl-3-(trifluoromethyl)-1h-pyrazol-4-amine (CAS 150187-15-8)
- Sodium 3-((ethyl(6-hydroxy-5-oxo-5H-benzo[a]phenothiazin-9-yl)amino)methyl)benzenesulfonate (CAS 6379-02-8)
- (S)-2-(((benzyloxy)carbonyl)amino)hexanedioic acid (CAS 24325-14-2)
- 4-(2-Methyl-phenyl)-2H-pyrazol-3-ylamine (CAS 93048-45-4)
- 5-Chloro-1-[(3,4-dichlorophenyl)methyl]-N-[2-(dimethylamino)ethyl]-6-oxo-1,6-dihydropyridine-3-carboxamide (CAS 338981-06-9)
- Methyl 2-amino-4-(4-cyclohexylphenyl)thiophene-3-carboxylate (CAS 350997-15-8)
- Semaglutide Impurity 183 (CAS 159541-28-3)
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