Hydrogen chloride — HTS 2806
Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid
Chapter 28 › Heading 2806
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 2806 is a four-digit product category for two inorganic chemicals: hydrogen chloride, also called hydrochloric acid, and chlorosulfuric acid. It groups these chemically related products before the tariff schedule separates them into more specific subheadings.
To select an eight-digit HTS code, first identify the chemical itself, then follow the tariff descriptions under heading 2806. The applicable subheading may distinguish the material or type, such as hydrogen chloride versus chlorosulfuric acid and, where provided by the tariff, the form or composition of the product. Use the product’s actual chemical composition—not its trade name or intended use—as the starting point.
What to check
- Check the safety data sheet, specification sheet, and certificate of analysis for the chemical name, formula, concentration, and any stabilizers or additives.
- Confirm whether the product is hydrogen chloride/hydrochloric acid or chlorosulfuric acid; do not treat similar-sounding acids as interchangeable.
- Read every level of the HTS text under heading 2806 and match the product to the most specific description available at the eight-digit level.
- Determine whether the item is a pure chemical, an aqueous solution, or another formulation, and verify whether the relevant subheading distinguishes that form or composition.
- Ask a customs broker or classification specialist to review ambiguous mixtures, formulations, or products with additives, and retain the technical evidence supporting the chosen code.
HTS heading 2806 summary
Hydrogen chloride is a 4-digit product category containing 2 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 2806.10.00.00 👉 | Hydrogen chloride (Hydrochloric acid) | Free | — | Free |
| 2806.20.00.00 👉 | Chlorosulfuric acid | 4.2% | Free | 25% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2806?
Hydrogen chloride (Hydrochloric acid); chlorosulfuric acid. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.