calcium oxide 
making the calcium carbide, the soda ash, the bleaching powder and so on, leather making, water purification 

calcium oxide

Property

White powder,density3.35.It can absorb carbon dioxide when put in the air and change into calcium carbonate.It dissolves easily in acid and hard in water,but can be combined with water into calcium hydroxide.

Uses

-for the manufacture of calcium carbide, soda ash, bleaching powder, etc., used as building materials, refractory materials, drying and soil conditioner and calcium

-used as analytical reagent, manufacturing phosphor flux

- for the manufacture of calcium carbide, soda ash, bleaching powder, etc., are also used for tanning, water purification, etc.

-for building materials, metallurgy flux, is hydrogen, and various calcium compounds, calcium oxide the main raw material is cheap chemical industry base. Widely used in pesticides, paper, food, petrochemicals, leather, waste water purification and so on. Ammonia can also be used for laboratory and dry alcohol de l water.

-for drug delivery.