Ammonium Tungstate Powder from Canada
Ammonium tungstate ((NH4)10W12O41·5H2O) is an ammonium salt of tungstic acid, falling under HTS 2841.80.00 for tungstates. It serves as a precursor in tungsten carbide production for cutting tools and as a source of tungsten in pigments.
Duty Rate — Canada → United States
5.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide assay reports confirming ammonium content to distinguish from sodium or other metal tungstates
• Declare exact hydrate form and particle size, as ultrafine powders may trigger additional dust hazard regulations
• Check for REACH or TSCA pre-registration if destined for EU or US chemical manufacturing