Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED 28 Inorganic chemicals;organic or inorganic compounds of precious metals, ofrare-earth, of radioactive elements or of isotopes 28 09 DIPHOSPHORUS PENTAOXIDE; PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS Commodity Code Description 28 09 10 Diphosphorus pentaoxide 28 09 20 Phosphoric acid and polyphosphoric acid