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Scientia Pharmaceutica is published by MDPI from Volume 84 Issue 3 (2015). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on as a courtesy and upon agreement with Austrian Pharmaceutical Society (Österreichische Pharmazeutische Gesellschaft, ÖPhG).
Open AccessArticle
Sci. Pharm. 2008, 76(4), 653-662; (registering DOI)

Spectral Characterization of Degradation Impurities of Paroxetine Hydrochloride Hemihydrate

Department of Analytical Research, Discovery Research, Dr. Reddy’s Laboratories, Bollaram Road, Miyapur, Hyderabad 500 049, India
Research and development, Dr. Reddy’s Laboratories Ltd., Integrated Product Development, Unit-III, Plot No.116, S.V. Co-Op.Indl. Estate, Bollaram, Jinnaram, Medak-502 325, India
Jawaharlal Nehru Technological University, Kukatpally, Hyderabad-500 072, India
Author to whom correspondence should be addressed.
Received: 10 August 2008 / Accepted: 14 September 2008 / Published: 23 September 2008
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Two unknown impurities were detected in stressed samples (by hydrochloric acid and hydrogen peroxide) of paroxetine hydrochloride hemihydrate (an active pharmaceutical ingredient – API) using a gradient reversed-phase high performance liquid chromatography (HPLC). These impurities were enriched and were present up to 30% in the degraded sample. The impurities were isolated from the degraded sample by column purification. Spectral data of the isolated impurities were collected. Based on the spectral data of two dimensional nuclear magnetic spectroscopy (2D-NMR) and mass spectrometry (MS) Impurity-1 and Impurity-2 were characterized as (3S,4R)-3-{[(6-chloro-1,3-benzodioxol-5-yl)oxy]methyl}-4-(4-fluorophenyl)piperidine and [(3S,4R)-4-(4-fluorophenyl)piperidin-3-yl]methanol respectively.
Keywords: Paroxetine; Degradation; NMR; HPLC; LC-MS Paroxetine; Degradation; NMR; HPLC; LC-MS
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MUNIGELA, N.; BABU, J.M.; YERRAMILLI, A.; KOLLA, N.K.; KRISHNAMURTHY, V.; MATHAD, V.V. Spectral Characterization of Degradation Impurities of Paroxetine Hydrochloride Hemihydrate. Sci. Pharm. 2008, 76, 653-662.

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