Ceftriaxone Impurity 39 CAS 139-33-3(Anhydrate CAS)
| CAS No. | 139-33-3(Anhydrate CAS) |
| Molecular Formula | C10H14N2O8 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ceftriaxone Impurity 39.
Ceftriaxone Impurity 39 (CAS 139-33-3(Anhydrate CAS)) is a certified pharmaceutical impurity reference standard with the molecular formula C10H14N2O8NaH2O and a molecular weight of 331.23 g/mol.
Ceftriaxone Impurity 39 (C10H14N2O8NaH2O) contains a carbohydrate-derived structure, an amide group. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C10H14N2O8 2*Na 2*H2O |
| Molecular Weight | 331.23 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Ceftriaxone Standards
- Ceftriaxone Disodium Salt Hemiheptahydrate (CAS 104376-79-6)
- Ceftriaxone Sodium E-Isomer (CAS 108260-00-0)
- Ceftriaxone-d3 Disodium Salt (CAS 1132650-38-4)
- Ceftriaxone Impurity 37 (CAS 149-30-4)
- Ceftriaxone Impurity 34 (CAS 1637561-91-1)
- Ceftriaxone Impurity Cefotaxime Triethylamine (CAS 219827-56-2)
- Ceftriaxone Sodium - Impurity E (Sodium Salt) (CAS 2227256-62-2)
- Ceftriaxone Impurity 41 (CAS 473843-58-2)
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