Ketoprofen Impurity 81 CAS CATO-C4X-147181
| CAS No. | CATO-C4X-147181 |
| Molecular Formula | C19H22O3 |
| Molecular Weight | 298.38 g/mol |
| 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 Ketoprofen Impurity 81.
CATO supplies Ketoprofen Impurity 81 (CAS CATO-C4X-147181), a pharmacopoeial impurity reference standard (molecular formula C19H22O3, MW 298.38 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Ketoprofen Impurity 81 (C19H22O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 298.38 g/mol, it falls into the medium-molecular-weight range. 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 Impurity 81 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 | C19H22O3 |
| Molecular Weight | 298.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Ketoprofen Standards
- Ketoprofen EP Impurity L (Mixture of Enantiomer) (CAS 1797984-80-5)
- Ketoprofen Impurity 31 (CAS 23323-37-7)
- Ketoprofen Impurity 113 (CAS CATO-C4X-1471113)
- Ketoprofen Impurity 80 (Mixture of Diastereomers) (CAS 2126161-79-1)
- Ketoprofen Impurity 91 (CAS CATO-C4X-147191)
- Ketoprofen EP Impurity J (CAS 1785759-59-2)
- Ketoprofen Ethyl Ester (CAS 60658-04-0)
- Ketoprofen Impurity 78 (CAS 136656-97-8)
Recommended Standards
- Fudosteine Impurity 81 (CAS CATO-C4X-144781)
- Atomoxetine Impurity 23 (CAS CATO-C4X-155023)
- Fudosteine impurity 75 (CAS CATO-C4X-144775)
- Exemestane EP Impurity F (CAS 72648-46-5)
- Erythromycin thiocyanate impurity A reduced derivative (CAS CATO-C4X-100168)
- Lumateperone Impurity 17 (CAS 2649799-31-3)
- Tegoprazan Impurity 122 (CAS 2351939-46-1)
- 4-Chloro-N'-(3-(trifluoromethyl)quinoxalin-2-yl)benzenesulfonohydrazide (CAS 343372-46-3)
- 6-Amino-2,4-dichloronicotinonitrile (CAS 1589541-56-9)
- 2-((3-Bromophenyl)thio)propanenitrile (CAS 1333766-49-6)
- 1,3-Dimethylimidazolidin-2-imine hydrochloride (CAS 87954-60-7)
- 4-(Pentyloxy)picolinimidamide hydrochloride (CAS 1179362-46-9)
- Methyl (R)-3-amino-3-(3-chloro-4-methylphenyl)propanoate (CAS 1213405-98-1)
- D-Ala18-Tirzepatide (CAS CATO-CPTD788916)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com