Holmium(III) sulphate, 99.99% - the inorganic compound, salt, holmium and sulfuric acid with the formula Ho2(SO4)3, yellow crystals, insoluble in water, forms a crystalline hydrate.
H 1810 (OTTO) Holmium(III) sulphate, 99.99% Cas 15622-40-9 - used in medical, dental, and fiber-optical applications.