Sulfonitric acids
Nitric acid; sulfonitric acids > Sulfonitric acids
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2808.00.00.20
Nitrosylsulfuric Acid (HNSO5)
Nitrosylsulfuric acid, also known as chamber acid or sulfonitric acid, is a chemically defined inorganic compound with the formula HNO2SO4 or [NO]+[HSO4]-. It falls under HTS 2808.00.00.20 as a sulfonitric acid, a mixed acid containing both nitric and sulfuric acid functionalities, classified in Chapter 28 for inorganic acids.
Fuming Sulfonitric Acid Mixture
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.
Chamber Process Sulfonitric Acid
Sulfonitric acid produced via the chamber process for sulfuric acid manufacturing, existing primarily as nitrosylsulfuric acid. It is classified in HTS 2808.00.00.20 as a sulfonitric acid, distinct from pure nitric acid under the same heading.
Industrial Nitrosulfuric Acid Solution 98%
A 98% pure aqueous solution of nitrosylsulfuric acid used in organic synthesis and explosives manufacturing. Falls under HTS 2808.00.00.20 as a chemically defined sulfonitric acid per Chapter 28 definitions, excluding organo-inorganic mixtures.