Tungsten Trioxide Hydrate (Yellow Tungstic Acid) from Germany
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 — Germany → Canada
0%
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