Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 Inorganic chemicals; organic or inorganic compounds of precious metals , of rare 28 39 Silicates; commercial alkali metal silicates. 28 39 11 28 39 11 00 Commodity Code Description 28 39 11 00 00 -- Sodium metasilicates 28 39 19 00 00 -- Other 28 39 90 00 00 - Other