Section 06 Products of the chemical or allied 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 19 Silicates of sodium (excl. metasilicates) Commodity Code Description 28 39 19 00 Silicates of sodium (excl. metasilicates) 28 39 19 10 Sodium silicates 28 39 19 20 Sodium orthosilicate; sodium pyrosilicate 28 39 19 90 Other