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 43 Colloidal precious metals; inorganic or organic compounds of precious metals, whether or not chemically defined; amalgams of precious metals. Commodity Code Description 28 43 10 Colloidal precious metals 28 43 21 Silver nitrate 28 43 29 Other 28 43 30 Gold compounds 28 43 90 Other compounds,amalgams