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has been cited by the following article:

• TITLE: A Novel Validated Stability Indicative UP-LC Method for Etravirine for the Determination of Process Related and Degradation Impurities

  AUTHORS: Mohanareddy Chilukuri, Katreddi H. Reddy, Papadasu Narayanareddy, Madireddi Venkataramana

  KEYWORDS: Etravirine; Forced Degradation; Ultra-Performance; Validation; Stability-Indicating

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.3 No.12, December 25, 2012

  ABSTRACT: A novel stability indicating reverse phase ultra performance liquid chromatographic (UP-LC) method has been developed for Etravirine along with eight impurities (imp-1, imp-2, imp-3, imp-4, imp-5, imp-6, imp-7 and imp-8) and validated as per ICH recommendations. Stress degradation conditions were established for Etravirine by subjecting it to stress conditions of acid, base, oxidation, humidity, thermal and photolysis. Significant degradation is observed in base stress condition and the major degradant (RRT at about 0.94) is identified by LC-MS and spectral analysis. The stress samples were assayed against a qualified reference standard and the mass balance was found close to 99.0%. Efficient chromatographic separation was achieved on a Shimpack ODS-II stationary phase with a gradient mobile phase combination. Quantification was carried at 303 nm at a flow rate of 0.6 mL?min–1. The resolution between Etravirine and eight potential impurities is found to be greater than 2.0. Regression analysis shows as r value (correlation coefficient) of greater than 0.999 for Etravirine and eight potential impurities. This method is capable to detect the impurities of Etravirine at a level of 0.003% with respect to test concentration of 1.0 mg·mL–1.