Ammonium Silicotungstate from China
Ammonium silicotungstate ((NH4)4SiW12O40) used in ion-exchange resins and analytics. As a complex tungstate salt of ammonium, properly classified in HTS 2841.80.0010.
Duty Rate — China → United States
30.5%
Rate breakdown
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Molecular weight confirmation distinguishes from simple tungstates
• Ion-exchange end-use declaration
• Stable solid form simplifies shipping