Lupasol® SK is a high molecular weight, water-based polyethyleneimine solution. Its strong cationic charge density makes it highly effective as a flocculant for coagulating negatively charged particles. Lupasol® SK is soluble in water and most polar organic solvents, and it can be easily diluted to the required working concentration. Commercially, it is supplied in drums and totes as a yellow, turbid liquid with 24% active content.