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 isotopes2811281112281112Chapter 28Copy pageHydrogen cyanide (hydrocyanic acid)DescriptionOther inorganic acids and other inorganic oxygen compounds of non-metals : Other inorganic acids : Hydrogen cyanide (hydrocyanic acid)Was this page helpful?YesNoPrevious281111Hydrogen fluoride (hydrofluoric acid)NextOther281119