Ibuprofen Impurity 39 CAS 81576-52-5
| CAS No. | 81576-52-5 |
| Molecular Formula | C21H27NO |
| Molecular Weight | 309.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Ibuprofen Impurity 39 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.
As a process- or degradation-related impurity, Ibuprofen Impurity 39 (CAS 81576-52-5, C21H27NO) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C21H27NO, Ibuprofen Impurity 39 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 309.45 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.
Physical & Chemical Properties
| Molecular Formula | C21H27NO |
| Molecular Weight | 309.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 1 |
Related Ibuprofen Standards
- Ibuprofen impurity 127 (CAS 105959-56-6)
- Ibuprofen Impurity 50 (CAS 81576-47-8)
- Ibuprofen Impurity 7 (CAS 121734-79-0)
- Ibuprofen Impurity 106 (CAS CATO-C4X-1082106)
- Ibuprofen Impurity 107 (CAS CATO-C4X-1082107)
- Ibuprofen Impurity 108 (CAS CATO-C4X-1082108)
- Ibuprofen Impurity 112 (CAS CATO-C4X-1082112)
- Ibuprofen Impurity 59 (CAS 89878-72-8)
Recommended Standards
- 50971-75-0 3-[4-(Diphenylmethyl)piperazin-1-yl]propan-1-amine DTXSID50548922 (CAS 50971-75-0)
- trans-4-[Bis(phenylmethyl)amino]cyclohexanemethanol (CAS 219770-58-8)
- Esomeprazole impurity 132 (CAS CATO-C4X-1112132)
- tert-butyl 4-(8-azabicyclo[3.2.1]octan-3-ylmethyl)piperazine-1-carboxylate (CAS 2383692-70-2)
- Didanosine Impurity 2 (CAS 890-38-0)
- Amlodipine Impurity 147 (CAS CATO-C4X-1095147)
- Perindopril Impurity N1 (CAS 108507-42-2)
- N-(4-(Dimethylamino)-2-ethoxypyrimidin-5-yl)thiophene-2-sulfonamide (CAS 1795415-91-6)
- 1-((2R,3R,5R)-5-(Aminomethyl)-3-hydroxytetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione (CAS 286939-22-8)
- 4-(Difluoromethylene)cyclohexan-1-amine hydrochloride (CAS 2253632-71-0)
- 1-Allyl-3,3-difluorocyclobutan-1-ol (CAS 2296976-98-0)
- 2-Ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine-D3 (cis/trans mixture) (CAS 72804-83-2)
- 2-Bromo-4-(4-isobutylphenyl)thiazole (CAS 1188040-69-8)
- Peptide Impurity (CAS CATO-CPTD788810)
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