Ditio-2,2'-bispyridin-dioxid-1,1'-(tillsatsämne med trihydrerad magnesiumsulfat) - (pyritiondisulfid + magnesiumsulfat) ###>Dithio-2,2-bispyridine-dioxide 1,1' (additive with trihydrated magnesium sulphate) - (pyrithione disulphide + magnesium sulphate)