Tert-Butylphosphonic Acid from Japan
Tert-butylphosphonic acid (t-BuP(O)(OH)2) contains direct P-C bond to tertiary butyl group. Classified HTS 2931.49.0080 as non-halogenated organo-phosphorus derivative. Used in metal surface treatment and polymer additives.
Duty Rate — Japan → United States
23.8%
Rate breakdown
9903.04.6211.3%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• pH stability data required for aqueous solutions
• Corrosive solid UN 3261; proper inner packaging essential
• Avoid classification as mixture if >90% purity