This sodium chlorite solution 25% is an EU quality product. It is approved for drinking water disinfection. It is not a technical quality. sodium chlorite alone, is not yet a drinking water disinfectant. Only when mixed with an acid does it become chlorine dioxide. This sodium chlorite can be optimally activated with hydrochloric acid to form chlorine dioxide. You can use the chlorine dioxide, bound in water, optimally for drinking water disinfection. You will find a set of sodium chlorite and hydrochloric acid HIER. More detailed information on the production of drinking water disinfection can be found in the INSTRUCTION. you have the choice of various quantities for subsequent purchase.