U.S. exports of Chlorosulfuric Acid (HS 280620) totaled $5K in August 2026, exported to 3 countries.
Last updated: August 2026 dataChlorosulfuric acid (also called chlorosulfonic acid) is a highly reactive sulfonating and chlorosulfonating agent used primarily in pharmaceutical synthesis, agrochemical manufacturing, and dye production — niche end uses that make it a specialty chemical with a concentrated supplier base. All US imports enter under a single line (2806200000), and Switzerland, Belgium, and the Netherlands — all major European fine-chemical exporters — account for the leading supply. Given its extreme reactivity with water and classification as a hazardous material, DOT transport compliance and proper container certification are critical entry requirements alongside customs clearance.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Production of chlorosulfuric acid is closely tied to integrated chlorine and sulfur trioxide manufacturing infrastructure, which is concentrated among large European chemical companies. Switzerland, Belgium, and the Netherlands host major specialty chemical producers with the safety systems and regulatory approvals needed to handle and export this highly reactive substance.
Beyond standard customs entry documents, importers must provide a Safety Data Sheet (SDS) meeting OSHA HazCom standards, DOT-compliant hazardous-materials shipping papers, and evidence of proper UN-specification packaging. EPA TSCA import certification is also required, and carriers must comply with hazmat transport regulations for corrosive materials.
ImportsExports
Imports
—YoY · free account
Exports
$5KYoY · free account
Low of 2 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $52K of Chlorosulfuric Acid.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 2 of 12 months reported, exports 7 of 12 months reported. Source: U.S. Census Bureau.
Subheading 2 of 2 in heading 2806
Subheading 280620 · $5K of $1.8M
Exports · August 2026
destination
Mexico and South Korea together take 100% of it.
customs district
origin
entry
rate provision · imports
None recorded for this period.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2806200000 | Chlorosulfuric Acid | — | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2806200000 | Chlorosulfuric Acid | $5K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Trade Directory
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