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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily oxides of sulfur rather than nitrosylsulfuric
2808 specificity for nitric/sulfonitric; sulfur oxides shift to 2810 per chapter hierarchy.
If imported in retail packaging <1L with stabilizers
Chapter exclusions for retail preparations direct to 3824; bulk industrial pure forms remain in 28.
If organic derivatives exceed inorganic nature
Chapter Note 2(b) excludes organo-inorganic to Chapter 29; applies to sulfonated organics.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure solution concentration >96% for sulfonitric status; dilute forms risk reclassification to mixtures
• File EPA import notifications for TSCA-regulated chemicals; include exposure limits data
Related Products 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.