Stabilization of the silver(I) complex with 2-(4,6-di-tert-butyl-2,3-dihydroxyphenylsulfanyl) acetic acid in the antimicrobial dosage form
Abstract
The influence of physico-chemical factors on the stability of the silver(I) complex with 2-(4,6-di-tert-butyl-2,3-dihydroxyphenylsulfanyl)acetic acid in the ointment composition based on methylcellulose hydrogel has been studied. The substance is shown to be stable provided the following conditions are fulfilled: 1) propylene glycol is used as a solvent; 2) citric acid is introduced into the ointment base of (down to pH = 4 –5) and polyvinylpyrrolidone (PVP) is added at a concentration of 5 %. The samples of ointments stable in storage are prepared, their antimicrobial activity exceeding that of «Dermazin» cream used in medical practice.
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