Citation: Narasimha S LAKKA, Chandrasekar KUPPAN, Parthasarathy RANGASAMY. Impurity profile of macitentan in tablet dosage form using a stability-indicating high performance liquid chromatography method and forced degradation study[J]. Chinese Journal of Chromatography, ;2019, 37(1): 100-110. doi: 10.3724/SP.J.1123.2018.06032 shu

Impurity profile of macitentan in tablet dosage form using a stability-indicating high performance liquid chromatography method and forced degradation study

1.
Department of Science and Humanities, VIGNAN's Foundation for Science, Technology & Research(VFSTR), Vadlamudi, Guntur(Dist.)522213, India;
2.
Department of Analytical Research & Development, Sinotherapeutics Inc., Shanghai 201210, China

Received Date: 30 June 2018

Macitentan (MAC) is a pulmonary arterial hypertension (PAH) drug marketed as a tablet and often has stability issues in the final dosage form. Quantitative determination of MAC and its associated impurities in tablet dosage form has not been previously reported. This study quantified impurities present in Macitentan tablets using a binary solvent-based gradient elution method using reversed phase-high performance liquid chromatography. The developed method was validated per International Conference on Harmonization (ICH) guidelines and the drug product was subjected to forced degradation studies to evaluate stability. The developed method efficiently separated the drug and impurities (48 min) without interference from solvents, excipients, or other impurities. The developed method met all guidelines in all characteristics with recoveries ranging from 85%-115%, linearity with r² ≥ 0.9966, and substantial robustness. The stability-indicating nature of the method was evaluated using stressed conditions (hydrolysis:1 N HCl at 80℃/15 min; 1 N NaOH at 25℃/45 min; humidity stress (90% relative humidity) at 25℃ for 24 h, oxidation:at 6% (v/v) H₂O₂, 80℃/15 min, thermolysis:at 105℃/16 h and photolysis:UV light at 200 Wh/m²; Fluorescent light at 1.2 million luxh). Forced degradation experiments showed that the developed method was effective for impurity profiling. All stressed samples were assayed and mass balance was>96%. Forced degradation results indicated that MAC tablets were sensitive to hydrolysis (acid and alkali) and thermal conditions. The developed method is suitable for both assay and impurity determination, which is applicable to the pharmaceutical industry.
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1.
沈阳化工大学材料科学与工程学院沈阳 110142