Ammonium 12-Tungstophosphate from Japan
Ammonium 12-tungstophosphate is a heteropolyacid salt (NH4)3PW12O40 used as an industrial catalyst. As a complex tungstate of ammonium, it falls under HTS 2841.80.0010 per notes on complex salts.
Duty Rate — Japan → 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 structural formula confirmation for heteropoly classification
• Register under TSCA if novel catalyst import
• Avoid pitfall of 3824 classification by proving single chemically defined compound