Barium sulfate is a white crystalline solid that is odorless and insoluble in water. An inorganic compound with the chemical formula BaSO4, it occurs as inorganic, mineral barite (heavy spar), which is the main commercial source of barium and materials prepared from it. Precipitated barium sulphate is a function filler which is superfine in nature and exhibits a low absorption threshold. It occurs as colorless orthorhombic crystals or a white amorphous powder, and does not dissolve in water, ethanol, and acid but is soluble in hot concentrated sulfuric acid. It allows insulation, prevents agglomeration & flocculation, and ultimately provides improved pigmentation efficiency to the surface upon which it is applied. Precipitated barium sulfate is synthetic barium sulfate precipitated with a specified particle size. The naturally occurring type of barium sulfate is used commonly.