Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 INORGANIC CHEMICALS; ORGANIC OR INORGANIC COMPOUNDS OF PRECIOUS METAL, OFRARE-EARTH METALS, OF RADIOACTIVE ELEMENTS OR OF ISOTOPES 28 09 DIPHOSPHORUS PENTAOXIDE; PHOSPHORIC ACID; POLYPHOSPHORIC ACIDS, WHETHER Commodity Code Description 28 09 10 DIPHOSPHORUS PENTAOXIDE 28 09 20 PHOSPHORIC ACID AND POLYPHOSPHORIC ACID