CAS #: 17927-65-0, Aluminium sulfate is a chemical matter with the formula Al2(SO4)3. It is applied in various industries, such as the wastewater treatment industry, water purification, and paper industry. Aluminium sulfate appears as white powder / granules and is odorless. It is hygroscopic and hence, able to absorb and retain water from the surroundings. It is also water-soluble, non-volatile, and non-flammable.