The chemical compound Al2S3 is named aluminum sulfide or aluminum sulphide. It is formed by an exothermic reaction between aluminum and sulfur, and it is a very hard gray solid when it has been cooled. Some of its forms include powder, chunk and wafer.
This compound has a melting point of 2,012 degrees Fahrenheit and a boiling point of 2,732 degrees. Its density is 2.32 grams per cubic centimeter, and it has a molar mass of 150.158 grams per mole. When placed in water, aluminum sulfide decomposes, though it cannot be dissolved when placed in acetone. The compound has a trigonal crystal structure, and there are several forms.