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 Sodium orthosilicate; sodium pyrosilicate 28 39 19 20 Sodium orthosilicate; sodium pyrosilicate Commodity Code Description 28 39 19 20 00 Sodium orthosilicate; sodium pyrosilicate
