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 isotopes2811281119281119Chapter 28Copy pageOtherDescriptionOther inorganic acids and other inorganic oxygen compounds of non-metals : Other inorganic acids : OtherWas this page helpful?YesNoPrevious281112Hydrogen cyanide (hydrocyanic acid)NextCarbon dioxide281121