Section 05 MINERAL PRODUCTS 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 20 Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) 25 20 20 Commodity Code Description 25 20 20 00 25 20 20 10 Of a kind suitable in dentistry 25 20 20 90 Other