* Physical and Chemical Properties:Aluminium sulfate is a salt with the formula Alz(SO4)3. lt is soluble in water Application: * Used as a paper sizing agent in the paper industry to enhance the waterresistance and impermeability of paper, * After being dissolved in water, the fine particles and natural colloidal particles inthe water can be coagulated into large flocs, which can be removed from the waterso it is used as a coagulant for water supply and wastewater.