1. A topical composition for treating skin pigmentation disorders, characterized in that it comprises in a physiologically acceptable medium at least 3% of rucinol or one of its salts as the only pharmaceutical active substance by weight relative to the total weight of the composition. . The composition according to claim 1, characterized in that rucinol or one of its salts is present in an amount ranging from 3 to 10 wt.% Relative to the total weight of the composition. The composition according to claim 1, characterized in that rucinol or one of its salts is present in an amount ranging from 3 to 5 wt.% Relative to the total weight of the composition. The composition according to claim 1, characterized in that rucinol or one of its salts is present in an amount of 5 wt.% Relative to the total weight of the composition. The use of a topical composition comprising rucinol or one of its salts as the only pharmaceutically active active ingredient in a concentration of at least 3 wt.% Relative to the total weight of the composition for the manufacture of a medicament for the treatment of pigmentation disorders of human skin. 6. The use according to claim 5, characterized in that the local composition comprises rucinol or one of its salts in a concentration of from 3 to 10 wt.% Relative to the total weight of the composition. The use according to claim 5 or 6, characterized in that the local composition comprises rucinol or one of its salts in a concentration of from 3 to 5 wt.% Relative to the total weight of the composition. The use according to claim 5, characterized in that the local composition comprises rucinol or one of its salts at a concentration of 5 wt.% Relative to the total weight of the composition. Application by1. Местная композиция, предназначенная для лечения расстройств пигментации кожи, отличающаяся тем, что она включает в физиологически приемлемой среде, по меньшей мере, 3% руцинола или одной из его солей в качестве единственного фармацевтического а