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dc.contributor.authorGerber, Minja
dc.contributor.authorBreytenbach, Jaco C.
dc.contributor.authorDu Plessis, Jeanetta
dc.contributor.authorHadgraft, Jonathan
dc.identifier.citationGerber, M. et al. 2006. Synthesis and transdermal properties of acetylsalicylic acid and selected esters. International journal of pharmaceutics, 310 (1-2): 31-36. []en_US
dc.description.abstractThe primary aim of this study was to determine the transdermal penetration of acetylsalicylic acid and some of its derivatives, to establish a correlation, if any, with selected physicochemical properties and to determine if transdermal application of acetylsalicylic acid and its derivatives will give therapeutic drug concentrations with respect to transdermal flux. Ten derivatives of acetylsalicylic acid were prepared by esterification of acetylsalicyloyl chloride with ten different alcohols. The experimental aqueous solubility, log D and transdermal flux values were determined for acetylsalicylic acid and its derivatives at pH 4.5. In vitro penetration was measured through excised female human abdominal skin in diffusion cells. The experimental aqueous solubility of acetylsalicylic acid (6.56 mg/ml) was higher than that of the synthesised acetylsalicylate derivatives (ranging from 1.76 x 10−3 to 3.32 mg/ml), and the log D of acetylsalicylic acid (−0.85) was lower than that of its derivatives (ranging from −0.25 to 1.95). There was thus an inverse correlation between the aqueous solubility data and the log D values. The experimental transdermal flux of acetylsalicylic acid (263.83 nmol/cm2 h) was much higher than that of its derivatives (ranging from 0.12 to 136.02 nmol/cm2 h).en_US
dc.subjectAcetylsalicylic aciden_US
dc.subjectskin penetrationen_US
dc.subjecttransdermal deliveryen_US
dc.titleSynthesis and transdermal properties of acetylsalicylic acid and selected estersen_US
dc.contributor.researchID10065318 - Du Plessis, Jeanetta
dc.contributor.researchID11329025 - Gerber, Minja
dc.contributor.researchID10059768 - Breytenbach, Jaco Cornelius

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