Abstract: The invention deals with an ferric phosphate based composition, in order to obtain which 100 mass fractions of orthophosphoric acid, 10-20 mass fractions of iron(III) oxide, 5-10 mass fractions of powdery aluminium oxide and 100 mass fractions of water are mixed, whereas the reaction takes place within a temperature range of 60-70° C. and at least one nanopowder from among silver, copper or flint is added to the mixture in the amount of 0.5 mass fractions, The ferric phosphate based compositions can be used for the bio- and fire protection of timber, as an antibacterial disinfectant, as well as a rust converter for the rust-inhibiting of metals.