Polyethyleneimine CAS 9002-98-6 is a colorless or light yellow viscous liquid, hyggability, soluble in water and ethanol, is strongly alkaline, has high chemical activity, and can react with a variety of substances, such as neutralizing reaction with acid, and addition reaction with ethylene oxide. unilong is a professional polyethyleneimine manufacturer with fast delivery and in stock to support small sample testing.