HS CodesVI · Products of the chemical or allied industries28 · Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes2804280429280429Chapter 28Copy pageOtherDescriptionHydrogen, rare gases and other non-metals : Rare gases : OtherWas this page helpful?YesNoPrevious280421ArgonNextNitrogen280430