Cr-Etch (Electronic Grade Chemicals) Description Uranus Chemicals Co., Ltd. has been providing Electronic Grade Chemicals, Ammonium Oxalate, Cerium Sulfate Tetrahydrate, Lanthanum Oxide and Tungsten Trioxide in Taiwan for many years. Since we consider customers’ satisfaction our utmost goal, we have endeavored to offer them high quality products and competitive prices. Etc. Cr-Etch (Electronic Grade Chemicals) Inquire Now