Aluminum sulfate includes industrial aluminum sulfate, iron-free aluminum sulfate, anhydrous aluminum sulfate, and so on. Depending on your needs, it is the best to meet the needs. Good quality aluminum sulfate is stable and reliable. Aluminum sulfate anhydrous is a widely used coagulant. Appearance: solid products are white, light green or light yellow flakes or blocks. Liquid products are colorless and transparent to light green or light yellow. Soluble in water, acid or alkali; insoluble in pure, aqueous solution is acidic.