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 isotopes2809280910280910Chapter 28Copy pageDiphosphorus pentaoxideDescriptionDiphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined : Diphosphorus pentaoxideWas this page helpful?YesNoPrevious280800Nitric acid; sulphonitric acidsNextPhosphoric acid and polyphosphoric acids280920