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In the present study, comprehensive stress testing of tenatoprazole was carried out according to ICH guide-line Q1A (R2). Tenatoprazole was subjected to stress conditions of hydrolysis, oxidation, photolysis and neutral decomposition. Extensive degradation was found to occur in acidic, neutral and oxidative conditions. Mild degradation was observed in basic conditions. The drug is relatively stable in the solid-state. Successful separation of drug from degradation products formed under stress conditions was achieved on a Kromasil C18 column (250 mm × 4.6 mm, 5.0 μ particle size) using methanol: THF: acetate buffer (68:12:20 v/v) pH adjusted to 6.0 with acetic acid as mobile phase, flow rate was 1.0 mL●min<sup>–1</sup> and column was maintained at 45°C. Quantification and linearity was achieved at 307 nm over the concentration range of 0.5 - 160 μg●mL<sup>–1</sup> for tenatoprazole. The method was validated for specificity, linearity, accuracy, precision, LOD, LOQ and robustness

american journal of analytical chemistry

Development and Validation of Stability Indicating RP-HPLC-PDA Method for Tenatoprazole and Its Application for Formulation Analysis and Dissolution Study