Fenofibrate Impurity 33 CAS 62809-68-1
| CAS No. | 62809-68-1 |
| Molecular Formula | C19H19ClO4 |
| Molecular Weight | 346.80 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Fenofibrate Impurity 33 (CAS 62809-68-1), a pharmacopoeial impurity reference standard (molecular formula C19H19ClO4, MW 346.80 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C19H19ClO4, Fenofibrate Impurity 33 contains a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 346.80 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), Fenofibrate Impurity 33 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 | C19H19ClO4 |
| Molecular Weight | 346.80 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Halogen Content | Cl-containing |
Related Fenofibrate Standards
- Fenofibrate Impurity 17 (CAS CATO-C4X-101817)
- Fenofibrate Impurity 18 (CAS CATO-C4X-101818)
- Fenofibrate EP Impurity E (CAS 42019-07-8)
- Fenofibrate Impurity 10 (CAS CATO-C4X-164310)
- Fenofibrate (CAS 49562-28-9)
- Fenofibrate Dihydro Impurity (CAS 61001-99-8)
- Fenofibrate Impurity 16 (CAS CATO-C4X-101816)
- Fenofibrate Impurity 14 (CAS CATO-C4X-164314)
Recommended Standards
- Choline fenofibrate EP Impurity E (CAS 42019-08-9)
- n-(6-Amino-1-butyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-2-chloro-n-(2-methoxyethyl)propanamide (CAS 1050883-98-1)
- 4-Chloro-2,5-difluoro-5-(5,5-dimethyl-1,3-dioxan-2-yl)valerophenone (CAS 898757-44-3)
- [(2-{[2-(3-Chlorophenyl)ethyl]amino}-2-oxoethyl)-(phenyl)amino]acetic acid (CAS 1142205-02-4)
- Dolutegravir Impurity N1 (CAS 1335210-34-8)
- Pregabalin Impurity 120 (CAS 3035505-68-8)
- Parecoxib sodium Impurity 9 (CAS 1373038-56-2)
- 1-Diethoxyphosphoryl-n,n-dimethyl-methanamine (CAS 3958-40-5)
- 2-Bromo-1-(selenophen-2-yl)ethanone (CAS 38025-30-8)
- 3-(4-Chlorophenyl)-1-(4,6-dimethylpyrimidin-2-yl)-1H-pyrazol-5-ol (CAS 1010866-05-3)
- (5-Methyl-thiophen-2-ylmethyl)-(tetrahydro-furan-2-ylmethyl)-amine hydrochloride 1052519-53-5 8170AC C11H18ClNOS (CAS 1052519-53-5)
- N-Boc-PEG-t-butyl ester (CAS 145119-18-2)
- (S)-1-(5-(trifluoromethyl)pyridin-2-yl)ethan-1-amine dihydrochloride (CAS 2061996-71-0)
- Semaglutide Impurity 184 (CAS CATO-C4X-2226184)
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