The positive effect of catechins has been proven with their antimicrobial, antiviral, anti-inflammatory and antioxidant actions for organisms, i.e. have important biological significance. More pharmacological functions have been discovered with catechins in-depth research. Catechins have various uses, such as controlling obesity, scavenging free radicals, delaying aging, inhibiting human pathogenic bacteria without harming the reproduction of beneficial bacteria, etc. The task of the work is to determine the properties (toxic) and environmental fate of catechin by means of in silico metods.