One of the ways to increase the specificity and biocompatibility of cytostatic drugs is the creation of conjugates of drugs with graphene oxide. Graphene and its oxidized form - graphene oxide (GO) - have become new promising materials in the field of nanomedicine due to its reactive and developed surface that can be subjected to covalent and non-covalent functionalization, which allows provide the immobilization of drugs. This article is devoted to a new method for the synthesis, identification and study of the biocompatibility of a non-covalent conjugate based on GO and an alkylating agent based on 1,3,5-triazine. The conjugate is hemocompatible, exhibit antioxidant activity in the model reaction with DPPH, Radachlorin and photoinduced hemolysis, has dose-dependent genotoxicity, and also exhibit cytotoxicity towards cell lines A549, PANC-1 and HeLa.