Abstract
This article studies the ongoing processes of environmental safety formation in the context of sustainable development of companies. It is hypothesized that during changes most companies in the petrochemical industry of the Republic of Tatarstan underestimate the need for a comprehensive modernization of the environmental component of sustainable development. In conditions of disturbances and uncertainty in the external environment it leads to increased entropy and loss of effectiveness of discrete measures to improve the environmental safety of enterprises. The study carried out an analysis with a depth of study of more than five years, which is characterized by the emergence of economic and social risks of a global nature and reveals the degree of their influence on the environmental safety of a complex strategically important for the republic. In conclusion, it is concluded that increasing systematicity in environmental safety management under conditions of uncertainty leads to an increase in the rate of sustainable development and the effect of production activities.