A yellowish powder or pellet with pungent odour, freely soluble compounds with various metallic ions. Pottassium Isobutyl Xanthate is also a stronger collector in the flotation of various nonferrous metallic sulfide ores. ottassium Isobutyl Xanthate is mainly used in floating copper , lead,zinc ect. Sulfide ores. It has displayed eapecially effective in the flotation of copper pres and of pyrites in natural circuits.