Section 06 Products of the chemical or allied industries 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare - earth metals, of radioactive elements or isotopes 28 39 Silicates; commercial alkali metal silicates 28 39 11 Sodium metasilicates 28 39 11 00 Sodium metasilicates Commodity Code Description 28 39 11 00 000 Sodium metasilicates
