| Thermal Stability and Decomposition Kinetic Studies of Acyclovir and Zidovudine Drug Compounds. | |
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MedLine Citation:
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PMID: 23299688 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Investigations on thermal behavior of drug samples such as acyclovir and zidovudine are interesting not only for obtaining stability information for their processing in pharmaceutical industry but also for predicting their shelf lives and suitable storage conditions. The present work describes thermal behaviors and decomposition kinetics of acyclovir and zidovudine in solid state, studied by some thermal analysis techniques including differential scanning calorimetry (DSC) and simultaneous thermogravimetry-differential thermal analysis (TG/DTA). TG analysis revealed that thermal degradation of the acyclovir and zidovudine is started at the temperatures of 400°C and 190°C, respectively. Meanwhile, TG-DTA analysis of acyclovir indicated that this drug melts at about 256°C. However, melting of zidovudine occurred at 142°C, which is 100°C before starting its decomposition (242°C). Different heating rates were applied to study the DSC behavior of drug samples in order to compute their thermokinetic and thermodynamic parameters by non-isothermal kinetic methods. Thermokinetic data showed that both drugs at the room temperature have slow degradation reaction rates and long shelf lives. However, acyclovir is considerably more thermally stable than zidovudine. |
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Authors:
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Mojtaba Shamsipur; Seied Mahdi Pourmortazavi; Ali Akbar Miran Beigi; Rouhollah Heydari; Mina Khatibi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-9 |
Journal Detail:
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Title: AAPS PharmSciTech Volume: - ISSN: 1530-9932 ISO Abbreviation: AAPS PharmSciTech Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100960111 Medline TA: AAPS PharmSciTech Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Chemistry, Razi University, Kermanshah, Iran, mshamsipur@yahoo.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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