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 16 Hydroxide and peroxide of magnesium; oxides... of strontium or barium 28 16 40 Oxides, hydroxides and peroxides of strontium or barium: 28 16 40 00 Oxides, hydroxides and peroxides of strontium or barium: Commodity Code Description 28 16 40 00 00 Oxides, hydroxides and peroxides of strontium or barium:
