A study is made of the influence of polyphenolsulfides on decomposion of hydroperoxide of cumin. An effect of increasing the time of expenditure of hydroperoxide in diluted solutions relatively the concentrated ones has been determined; this indicator is a consequence of autocatalytic process. There has been established a phenomenon of deactivation of polyphenol sulfides as catalysts of desintegration of the reaction with peroxiradicals. The kinetic characteristics of interaction of the given substances.