Ferrocid® 4601 is a patent based on a stabilized bromine solution and has been specifically developed to be applied for the treatment of water circuits in both commercial and industrial settings. It is a single-component liquid product, which develops bromine, which leads to excellent results in circuits where the alkalinity is higher or where high concentration cycles are used or in circuits where there is high organic mass and/or process contamination industrial. Compared to other biocidal treatment systems, a dosing pump is sufficient for dosing the product. Ferrocid® 4601 is very effective in controlling biofilm, the thin layer developed due to bacterial growth, which is also a reservoir for Legionella.