polyethylenimine CAS : 9002-98-6,25987-06-8 Assay:50%,98% Appearance: Colorless or yellowish liquid PH value: 11-12 Usage: 0.1-10mg/l Application: It is used as basic brightener, crystal-grained agent to improve Dispersion f orce in alkaline plating for zinc, copper, tin, copper-tin alloy, aluminum alloy and etc.