The biocidal products do not pose any particular risks to the environment or health. Indeed, the active substances and additives that constitute the biocidal products according to the invention are of plant, agricultural, and renewable origin, and are furthermore completely biodegradable. The concentrated biodegradable biocidal formulation includes compounds from renewable plant resources, such as at least lactic acid and/or citric acid in a proportion of 76 wt % to 98 wt % relative to the total weight of the formulation and at least one sodium and/or potassium carboxylate including 5 to 16 carbon atoms serving as an anionic surfactant in a proportion of 2 wt % to 24 wt % relative to the total weight of the formulation.
