2806.20.00.00 - Chlorosulfuric acid

This HTS classification, 2806.20.00.00, specifically covers **chlorosulfuric acid**. Chlorosulfuric acid, also known as chlorosulfonic acid, is a highly reactive inorganic chemical compound with the formula HSO₃Cl. It is characterized by its fuming, colorless liquid form, which readily hydrolyzes in water, producing sulfuric acid and hydrochloric acid. Its primary uses are in the synthesis of other chemicals, particularly as a sulfonating agent in organic chemistry, and in the production of detergents and dyes.

Within the broader category of "Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid," this HTS code is distinct from its sibling, 2806.10.00.00. While both fall under the umbrella of related halogenated acids, 2806.10.00.00 exclusively covers hydrogen chloride, whether in gaseous form or as aqueous hydrochloric acid. In contrast, 2806.20.00.00 is solely dedicated to chlorosulfuric acid, differentiating it by its unique chemical composition and properties as a mixed anhydride of sulfuric and hydrochloric acids.

As a leaf node in the HTS database, 2806.20.00.00 does not have further subcategories. This indicates that all goods identified as chlorosulfuric acid, regardless of purity or minor variations in presentation (e.g., specific concentrations or forms if still meeting the definition of the compound), will be classified under this single code. Classification at this level relies on confirming the chemical identity and composition of the imported or exported substance as chlorosulfuric acid.