90% Sodium Isobutyl Xanthate SIBX CAS NO.: 25306-75-6 As Copper Flotation Collector Sodium Isobutyl XanthateA yellowish powder or pellet with a pungent odour, freely soluble in water.Sodium isobutyl xanthate is also a stronger collector in the flotation of various nonferrous metallic sulfide ores. Sodium isobutyl xanthate is mainly used