Ketoprofen EP Impurity K (Mixture of Isomers) CAS 1785760-29-3
| CAS No. | 1785760-29-3 |
| Molecular Formula | 2*C19H20O3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Ketoprofen EP Impurity K (Mixture of Isomers) (CAS 1785760-29-3) is a certified pharmaceutical impurity reference standard with the molecular formula C19H20O3 and a molecular weight of 296.37 g/mol.
Based on its molecular formula C19H20O3, Ketoprofen EP Impurity K (Mixture of Isomers) contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 296.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Ketoprofen EP Impurity K (Mixture of Isomers) 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 | 2*C19H20O3 |
| Molecular Weight | 296.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
Related Ketoprofen Standards
- Ketoprofen EP Impurity D (CAS 107257-20-5)
- Ketoprofen Impurity 35 (CAS 108315-48-6)
- Ketoprofen Impurity 23 (CAS 1092395-13-5)
- Ketoprofen-13C-d3 (CAS 1189508-77-7)
- Ketoprofen-d3 Methyl Ester (CAS 1189950-12-6)
- Ketoprofen-13CD3 Methyl Ester (CAS 1190007-27-2)
- (±)-Ketoprofen-d4 (propionic-d4 acid) (CAS 1219805-29-4)
- Ketoprofen Impurity N6 (CAS 1257296-76-6)
Recommended Standards
- Cefcapene Impurity 65 (CAS CATO-C4X-182465)
- Palbociclib Impurity 8 (CAS CATO-C4X-11258)
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- DIF-1 (CAS 111050-72-7)
- (4-(9H-Carbazol-9-yl)phenyl)methanol (CAS 71935-22-3)
- 8-Oxabicyclo[3.2.1]octan-3-amine hydrochloride (CAS 1630906-33-0)
- 32580-69-1 6Z-0260 ethyl (2E)-3-[4-(propan-2-yl)phenyl]prop-2-enoate (CAS 32580-69-1)
- Dextrorphan Tartrate Salt (CAS 143-98-6)
- Tert-butyl (2S,4S)-2-(aminomethyl)-4-(benzyloxy)-2-(cyclobutylmethyl)pyrrolidine-1-carboxylate (CAS 2566693-61-4)
- Insulin Degludec Impurity 18 (CAS CATO-C4X-215718)
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