| Tariff Classification |
| section 06 | Products of the chemical or allied industries |
| chapter 28 | Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes |
| 28.09 | Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined: |
| 2809.10 | －Diphosphorus pentaoxide |
|