Phosphorus Pentoxide-Derived Polyphosphoric Acid from China
Phosphorus pentoxide-derived polyphosphoric acid produced by dissolving diphosphorus pentoxide (P2O5) in phosphoric acid, forming chains of (HPO3)n. Used in cyclization reactions and as a dehydrating agent, this chemically defined polyphosphoric acid is classified under tariff item 2809.20.00.
Duty Rate — China → Canada
0%
Import Tips
• Document the production method and P2O5 content to support the classification as polyphosphoric acid
• Check if the product is subject to any Canadian chemical management plan requirements under the Canadian Environmental Protection Act
• Ensure proper handling and storage documentation for viscous, corrosive liquids