Potassium Tungstate from Canada
Potassium tungstate (K2WO4) is an inorganic salt of tungstic acid used in fireproofing textiles and as a catalyst precursor, classified in HTS 2841.80.0050 as other tungstates. It meets Chapter 28 criteria for chemically defined metal salts.
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
• Label with exact CAS number (13472-45-2) for customs verification
• Include end-use declaration if for industrial vs lab use to avoid scrutiny
• Prevent reclassification as luminophore base (3206) if doped