thulium(+3) cation trinitrate hexahydrate has specialized uses in ceramics, glass, phosphors, lasers, also is the important dopant for fibre amplifiers. thulium(+3) cation trinitrate hexahydrate is a highly water soluble crystalline Thulium source for uses compatible with Nitrates and lower (acidic) pH. thulium(+3) cation trinitrate hexahydrate can be manufactured as solutions at specified stoichiometries.