Fuming Sulfonitric Acid Mixture from Japan
A fuming sulfonitric acid solution combining concentrated nitric acid (HNO3) and sulfuric acid (H2SO4) in nitrosylsulfuric form, used in nitration processes. Classified under HTS 2808.00.00.20 as it meets the definition of sulfonitric acids per Chapter 28 notes for chemically defined inorganic acids.
Duty Rate — Japan → United States
12.5%
Rate breakdown
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
• Submit assay reports showing nitrosylsulfate content > specific threshold to confirm sulfonitric classification over plain nitric acid
• Use UN 1791 classification for transport; ensure tanks are acid-resistant and include emergency response plans
• Avoid misdeclaration as 'mixed acid' which could trigger 3824 reclassification; maintain 99%+ purity records