HS Code 2806.20 – Chlorosulphuric acid

HS code 280620 is a 6-digit subheading in the Harmonized System that covers: Chlorosulphuric acid. Chlorosulphuric acid, also known as chlorosulfonic acid, is a highly reactive and corrosive inorganic compound primarily traded for its specialized applications in the chemical industry. Unlike more common acids, its trade volume is smaller but critical for specific synthesis pathways. It serves as a key reagent in the production of synthetic detergents, particularly sulfonates, and is also used in the manufacture of dyes, pharmaceuticals, and pesticides. Its strong dehydrating and chlorinating properties make it valuable for introducing sulfonyl chloride groups into organic molecules. Importers are typically specialized chemical manufacturers in developed and developing economies, seeking intermediates for their downstream products. Exporters are usually large chemical companies with the capacity for complex inorganic synthesis. Key considerations in its international trade include extreme caution in handling and transportation due to its highly corrosive and fuming nature, reacting violently with water and organic materials. Strict regulatory compliance for hazardous materials is paramount. Its niche but essential role in various chemical syntheses ensures its continued, albeit controlled, presence in global trade, supporting the production of a wide array of consumer and industrial goods.

Chlorosulfonic acid, chlorosulphonic acid, industrial-grade chlorosulfonic acid, reagent-grade chlorosulfonic acid, fuming chlorosulfonic acid

This code is specific to chlorosulphuric acid. It could be confused with sulfuric acid (280700) or other sulfur-containing acids, but its unique chemical structure (containing both chlorine and sulfur) distinguishes it for specific reactions.

In 2025, the top exporters of HS code 280620 in UN Comtrade data were Switzerland ($3.9M, 42% of world exports), Germany ($2.0M) and China ($1.2M). World exports came to about $9.3M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

In 2025, the top importers of HS code 280620 in UN Comtrade data were France ($3.0M, 31% of world imports), Germany ($2.4M) and Romania ($1.6M). World imports came to about $9.8M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

HS code 280620 is a 6-digit subheading under the Harmonized System. The first 2 digits (28) identify the chapter, digits 3-4 (06) identify the heading, and digits 5-6 (20) specify the subheading. This code is standardized globally by the World Customs Organization.

In Brazil, HS code 280620 is NCM 2806.20.00. The last two digits are 00 because Brazil does not split this HS code further.