Disodium Phosphite Pentahydrate from Japan
Disodium phosphite pentahydrate (Na2HPO3·5H2O) is a hydrated form of sodium phosphite used as a reagent in analytical chemistry. Despite the water of hydration, it remains a separate chemically defined compound under Chapter 28, as hydrates are not excluded. It is a phosphonate (phosphite) of an inorganic base, sodium, and falls under this tariff item.
Duty Rate — Japan → Canada
0%
Import Tips
• Declare the exact hydrate form and water content to avoid misclassification
• Keep documentation showing the product is chemically defined and not a mixture
• Verify if the solvent or stabilizers affect classification under Chapter 28