... mordant, tanning agent, medicine astringent, wood preservative and so on Aluminum sulfate 1.Characters:content: 15.8%,16%,17%cas no:10043 ... , lumpy and liquid.2.Specification: ItemAluminum Sulphate 15.8%Aluminum Sulphate 16%Aluminum Sulphate 17%AL2O3>15.8%>16%>17%Fe<0 ... after payment or depend on your requirement11.contact us : No Iron Aluminum Sulfate