Explanatory notes
… are excluded ( heading 38.24 ). Artificial corundum is put up in small pieces or masses, crushed or in grains; it … aluminium silicates, respectively) or of laboratory utensils and in the electrical industry. (B) ALUMINIUM … a light white powder, insoluble in water, specific gravity about 3.7. Uses include, e.g., in aluminium metallurgy, as a …