Dipotassium Carbonate Monohydrate Crystals from United States
Dipotassium carbonate monohydrate (K2CO3·H2O) is a hydrated form of potassium carbonate, still a separate chemically defined compound. It is used in laboratory reagents and fine chemical synthesis. The water of hydration is inherent to the compound and does not exclude it from Chapter 28, as it is not a solution but a crystalline hydrate, classifiable under tariff item 2836.40.00.
Duty Rate — United States → Canada
Import Tips
• Ensure the monohydrate form is clearly documented, as anhydrous and hydrated forms may have different duty implications but share the same tariff item
• Provide the exact chemical formula and CAS number (for monohydrate, 6381-79-9) on the commercial invoice
• If used in laboratory settings, verify no additional packaging or retail sale elements trigger other headings