Erythromycin A 9-Oxime (Mixture of Z and E Isomers) CAS 13127-18-9
| CAS No. | 13127-18-9 |
| Molecular Formula | C37H68N2O13 |
| Molecular Weight | 748.94 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Erythromycin A 9-Oxime (Mixture of Z and E Isomers) (C37H68N2O13) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 748.94 g/mol, it falls into the high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Erythromycin A 9-Oxime (Mixture of Z and E Isomers) (CAS 13127-18-9), a certified reference material (molecular formula C37H68N2O13, MW 748.94 g/mol) for analytical method development and quality control.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C37H68N2O13 |
| Molecular Weight | 748.94 g/mol |
| Purity | >90% |
| 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.) | 1960 |
| Nitrogen Atoms | 2 |
Related Erythromycin Standards
- (9Z)-Erythromycin A Oxime (CAS 134931-01-4)
- Erythromycin Z Oxime (CAS CATO-C4X-100129)
- Erythromycin Impurity 39 (CAS CATO-C4X-100139)
- Erythromycin thiocyanate impurity C reduced derivative (CAS CATO-C4X-100167)
- Erythromycin EP Impurity H（Erythromycin A N-oxide） (CAS 992-65-4)
- Erythromycin Impurity 46 (CAS CATO-C4X-100146)
- Erythromycin EP Impurity A (CAS 82230-93-1)
- Erythromycin Impurity 50 (CAS 37152-22-0)
Recommended Standards
- Gadobutrol Impurity 183 (CAS CATO-C4X-2120183)
- Azithromycin (CAS 83905-01-5)
- Azithromycin Impurity 40 (CAS 76820-32-1)
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- 2-(1-Oxo-4-phenylphthalazin-2(1H)-yl)acetic acid (CAS 127828-88-0)
- Ilaprazole Impurity 146 (CAS CATO-C4X-1130146)
- 1-(4-Chlorobenzyl)-4-methyl-1H-pyrazol-5-amine (CAS 1015846-01-1)
- 2-Propoxypyridin-3-ol (CAS 1232013-70-5)
- 1H-PYRIDO[3,4-B]INDOLE, 2,3,4,9-TETRAHYDRO-9-METHYL- (CAS 16502-02-6)
- N-(3-Ethynylphenyl)pivalamide (CAS 310874-35-2)
- (Tyr9)-Cholecystokinin Octapeptide (sulfated) (H-9770.0005) (CAS 96607-61-3)
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