Pranoprofen Impurity 38 CAS 53944-40-4
| CAS No. | 53944-40-4 |
| Molecular Formula | C14H9NO3 |
| Molecular Weight | 239.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Pranoprofen Impurity 38 is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Pranoprofen Impurity 38 (CAS 53944-40-4) is a certified pharmaceutical impurity reference standard with the molecular formula C14H9NO3 and a molecular weight of 239.23 g/mol.
Pranoprofen Impurity 38 (C14H9NO3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C14H9NO3 |
| Molecular Weight | 239.23 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 1 |
Related Pranoprofen Standards
- Pranoprofen Impurity 40 (CAS CATO-C4X-181140)
- Pranoprofen Impurity N3 (CAS 52549-07-2)
- Pranoprofen Impurity 43 (CAS CATO-C4X-181143)
- Pranoprofen Impurity 80 (CAS CATO-C4X-181180)
- Pranoprofen Impurity 81 (CAS CATO-C4X-181181)
- Pranoprofen Impurity 42 (CAS CATO-C4X-181142)
- Pranoprofen Impurity 49 (CAS 1254691-84-3)
- Pranoprofen Impurity 54 (CAS CATO-C4X-181154)
Recommended Standards
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- Metformin EP Impurity B Nitrate (CAS 3553-49-9)
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- Methyl 2-(4-bromophenyl)-2-((tert-butoxycarbonyl)amino)acetate (CAS 709665-73-6)
- Tert-butyl 1-oxo-7-azaspiro[4.5]Decane-7-carboxylate (CAS 1936622-97-7)
- (Trp63,Trp64)-C3a (63-77) (H-1264.0005) (CAS 130154-64-2)
- 5-(2-(Chloromethyl)butyl)-1-methyl-1h-1,2,4-triazole (CAS 1481916-16-8)
- 2-(3-Amino-4-bromo-1h-pyrazol-1-yl)butanoic acid (CAS 1339700-88-7)
- Tirzepatide Impurity 44 (CAS CATO-C4X-324044)
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