Aluminum sulfate acts as a flocculating agent in the purification of drinking water, and in waste water treatment plants. It acts as a mordant in dyeing, printing, textiles and also used in paper manufacturing. It is a waterproofing agent and accelerator in concrete. Further, it is used as a foaming agent in fire fighting foam, photographic film and in photochemicals. It is also used in styptic pencils, pain relief and in dentistry for gingival retraction cords.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.