Tungsten Trioxide Hydrate (Yellow Tungstic Acid) from Japan
Tungsten trioxide hydrate (yellow tungstic acid, 5WO3·H2O) is a hydrated form of tungsten trioxide used in catalyst impregnation. Hydrates of metal oxides remain classified as oxides under Chapter 28, as they are not specified as acids elsewhere. It falls under tariff item 2825.90.00 as 'Other' metal oxides.
Duty Rate — Japan → Canada
PGA flags (2)Show detailsHide detailsCFIAAll ProgramsRequiredHCActive Pharmaceutical IngredientsMay be required
- CFIA
All Programs · Required
CANADIAN FOOD INSPECTION AGENCY: CFIA All Programs requires review / declaration data. CBSA's Single Window matching criteria match this classification number (Equal To 2825900000).
- HC
Active Pharmaceutical Ingredients · May be required
May require HC Active Pharmaceutical Ingredients depending on intended use (HC13) and Canadian product category (HC01). Matching criteria: Starts With 2825. Logic: MATCH IF (Valid HS Code) AND (Intended Use Code) AND (Valid Canadian Product Category).
CBSA Single Window matching criteria, unknown
Import Tips
• Clearly describe the product as tungsten trioxide hydrate, not as an acid, to avoid misclassification
• Include the water content and chemical formula (5WO3·H2O) in the product documentation
• Confirm with the CBSA whether the hydrate form affects the duty rate or requires any special permits