Penfluridol Impurity 5 CAS 61668-03-9
| CAS No. | 61668-03-9 |
| Molecular Formula | C16H14F2 |
| Molecular Weight | 244.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 244.28 g/mol gives Penfluridol Impurity 5 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Penfluridol Impurity 5 (CAS 61668-03-9) is a certified pharmaceutical impurity reference standard with the molecular formula C16H14F2 and a molecular weight of 244.28 g/mol.
Owing to fluorine substitution, a polycyclic aromatic system, Penfluridol Impurity 5 is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 244.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C16H14F2 |
| Molecular Weight | 244.28 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| 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 |
| CAS Registry Year (est.) | 1974 |
| Halogen Content | F-containing |
Related Penfluridol Standards
- Penfluridol Impurity 9 (CAS 1121585-10-1)
- Penfluridol Impurity 1 (CAS 3799-84-6)
- Penfluridol Impurity 14 (CAS 106392-60-3)
- Penfluridol Impurity 7 (CAS 1489363-63-4)
- Penfluridol Impurity 10 (CAS 262272-58-2)
- Penfluridol Impurity 11 (CAS CATO-C4X-353811)
- Penfluridol Impurity 8 (CAS 77294-14-5)
- Penfluridol Impurity 1 (CAS 21928-50-7)
Recommended Standards
- Barloxavir impurity 91 (CAS 1057218-86-6)
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- 1-(2-Methylphenyl)-5-propyl-1h-pyrazole-4-carboxylic acid (CAS 1002284-36-7)
- Milbemycin Oxime EP Impurity E (CAS 86691-97-6)
- Diazoxide Impurity 14 (CAS CATO-C4X-195214)
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- 5-Ethyl-2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (CAS 1905413-47-9)
- 4-(4-Methoxyphenyl)-2-methyl-4-oxobutanenitrile (CAS 1181379-09-8)
- Heptyl (R)-4-(1-amino-2,2,2-trifluoroethyl)benzoate (CAS 1213068-04-2)
- 4-Amino-2-(2,5-dimethylphenyl)-1,5-dimethyl-2,3-dihydro-1h-pyrazol-3-one (CAS 1094511-72-4)
- 2,2′-[1,1′-Biphenyl]-4,4′-diylbis[4,5-dihydrooxazole] (CAS 77545-13-2)
- Biotinyl-S6 Phosphate Acceptor Peptide trifluoroacetate salt (CAS 1815618-12-2)
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