Cephalexin Diketopiperazine Sodium Salt CAS 62673-90-9
| CAS No. | 62673-90-9 |
| Molecular Formula | C16H16N3O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Cephalexin Diketopiperazine Sodium Salt (C16H16N3O4SNa) is characterized by a flavonoid core, an amide group, a sulfone 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Cephalexin Diketopiperazine Sodium Salt (CAS 62673-90-9), molecular formula C16H16N3O4SNa and molecular weight 369.37 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C16H16N3O4S Na |
| Molecular Weight | 369.37 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°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) | 10.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cephalexin Standards
- Cephalexin Impurity 18 (CAS 1260607-12-2)
- Cephalexin Impurity 13 (CAS 1323247-65-9)
- Cephalexin Impurity 28 (CAS 142975-48-2)
- Cephalexin-d5 (CAS 2101505-56-8)
- Cephalexin Impurity 18 (CAS 34632-04-7)
- Cephalexin Impurity 15 (CAS 36114-06-4)
- Cephalexin Related Compound (CAS 37050-97-8)
- Cephalexin Sodium Salt (CAS 38932-40-0)
Recommended Standards
- Trimethyl((2-((tetrahydro-2H-pyran-2-yl)oxy)phenyl)ethynyl)silane (CAS 196106-30-6)
- 4-Acetamido-[1,1'-biphenyl]-3-yl dihydrogen phosphate (CAS 77273-71-3)
- 2-Chloro-4-cyano-3-methoxybenzoic acid (CAS 1805563-96-5)
- 3-Cyano-2,7-dimethylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid (CAS 1221792-41-1)
- 17892-25-0 3,5-Dibromosalicylamide 3,5-dibromo-2-hydroxybenzamide (CAS 17892-25-0)
- tert-Butyl 6-(bromomethyl)-1h-indazole-1-carboxylate (CAS 1126424-54-1)
- 2-(3,3-Difluoropiperidin-1-yl)-5-nitrobenzaldehyde 1779123-28-2 (CAS 1779123-28-2)
- N-tert-Butyl-N-[(phenylcarbamoyl)amino]-2-[3-(trifluoromethyl)benzamido]benzamide (CAS 866009-74-7)
- 2-(4-Piperidinyl)ethyl 2,2,2-trichloroacetate hydrochloride (CAS 1219979-87-9)
- Semaglutide Impurity 176 (CAS CATO-C4X-2226176)
Why CATO?
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