Acemetacin EP Impurity B Potassium Salt CAS 28751-45-3
| CAS No. | 28751-45-3 |
| Molecular Formula | C19H16ClNO4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Acemetacin EP Impurity B Potassium Salt (CAS 28751-45-3) is a high-purity analytical reference standard with the molecular formula C19H16ClNO4K and a molecular weight of 396.89 g/mol.
The molecular framework of Acemetacin EP Impurity B Potassium Salt (C19H16ClNO4K) is characterized by a salt form, a flavonoid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Acemetacin EP Impurity B Potassium Salt meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C19H16ClNO4 K |
| Molecular Weight | 396.89 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Acemetacin Standards
- Acemetacin-D4 (CAS 1196151-16-2)
- Acemetacin acyl-β-D-glucuronide (CAS 1260603-31-3)
- Acemetacin (CAS 53164-05-9)
- Acemetacin EP Impurity E (CAS 75302-98-6)
- Acemetacin EP Impurity F (CAS 76812-49-2)
- Acemetacin EP Impurity D (CAS 76812-64-1)
- Acemetacin Impurity 1 (CAS 77914-62-6)
- Acemetacin EP Impurity C (CAS CATO-C4X-33821)
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- Liraglutide Impurity 14 TFA Salt (CAS CATO-C4X-199214)
Why CATO?
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