1 Chemicals and minerals used in the manufacturing of aluminum, alumina, bauxite, aluminum fluoride, aluminum sulphate, kaolin, phosphates, organo-aluminum compounds, magnesium, magnesia, mixtures of magnesia and lime, alumina hydrate chlorine, magnesium chloride, aluminum powder, magnesium silicate and industrial borates and chemical compositions used as fertilizers for domestic, agriculture and horticulture use; chemical substances for preserving foodstuffs