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SITCSection 5
U.S. imports of hydrogen chloride (hydrochloric acid) & chlorosulfuric acid (SITC 52231) totaled $4.4M in April 2026, traded with 16 countries.
Importers of Hydrogen Chloride (Hydrochloric Acid) & Chlorosulfuric Acid paid $88K in duties in April 2026 — an effective duty rate of 9.2% on $961K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataHydrochloric acid is a foundational industrial chemical used in steel pickling, pH adjustment, and the production of PVC and chlorine compounds, while chlorosulfuric acid serves as a key sulfonating agent in pharmaceuticals and agrochemicals. Both are classified as hazardous materials under DOT regulations, requiring proper placarding, packaging, and safety data documentation at the port of entry. Importers should confirm EPA Toxic Substances Control Act (TSCA) compliance before shipment, as both substances are subject to chemical import certification requirements. Concentration and purity grade are critical classification factors that can affect duty treatment and end-use eligibility.
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Yes. Hydrochloric acid and chlorosulfuric acid are chemical substances subject to TSCA, so importers must submit either a positive certification (confirming compliance) or a negative certification (confirming the substance is not subject to TSCA) at the time of entry.
Purity level and concentration can influence whether a shipment is classified as a technical-grade industrial acid or a higher-purity reagent-grade product. Misclassification between grades can affect applicable duty rates and end-use documentation requirements, so verifying the correct tariff line with a licensed customs broker is advisable.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $3.4M | $1.3M | -$2.1M |
| MEXICO | -- | $520K | +$520K |
| JAPAN | $379K | -- | -$379K |
| GERMANY | $235K | $9K | -$226K |
| KOREA, SOUTH | $63K | $72K | +$8K |
Monthly import values over time