Scientific Opinion on safety and efficacy of zinc compounds (E6) as feed additive for all species: zinc sulphate monohydrate, based on a dossier submitted by Grillo-Werke AG/EMFEMA

Zinc sulphate monohydrate is considered as a safe source of zinc for all animal species, regarding the maximum contents for total zinc in feedingstuffs set by the EU. Based on data on consumer exposure and the tolerable upper intake level determined for zinc, no concerns for consumer safety are expected from the use of zinc sulphate monohydrate in animal nutrition. The hazards associated with handling of zinc sulphate monohydrate are well recognised and documented. In particular, zinc sulphate monohydrate is considered as a severe irritant to eyes. The zinc sulphate monohydrate under application is considered a compound with high dusting potential, which may result in exposure of users by inhalation. In the view of the FEEDAP Panel, it would be prudent to take measures to avoid exposure by inhalation. The use of zinc-containing feed additives does not pose a direct environmental concern for agricultural soils, but the available data were not sufficient to exclude any risk related to drainage and the run-off of zinc to surface water. The use of zinc-containing additives in aquaculture up to maximum authorised zinc level in feeds is not expected to pose an appreciable risk to the environment. Zinc sulphate monohydrate is an efficacious source of zinc in meeting animal requirements.