Cyanides — HTS 2837
Cyanides, cyanide oxides and complex cyanides
Chapter 28 › Heading 2837
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 2837 is a broad product category for cyanides, cyanide oxides, and complex cyanides. These are chemical substances that contain a cyanide group; the heading groups related products together before the tariff schedule separates them into more specific subheadings.
To reach the correct 8-digit HTSUS code, start with the product’s exact chemical identity and then follow the subheading structure. The schedule may distinguish products by material or chemical type, such as a particular cyanide, cyanide oxide, or complex cyanide. The product’s composition, formulation, and any applicable chapter or section notes can affect classification. Confirm the complete 8-digit description rather than relying only on a commercial name or an abbreviated chemical name.
What to check
- Obtain the product’s safety data sheet, technical specification, chemical formula, and CAS Registry Number, if available.
- Identify whether the item is a single chemical, a cyanide oxide, or a complex cyanide, and check the relevant subheading descriptions.
- Verify the product’s actual composition, including mixtures, solutions, stabilizers, impurities, or other additives; do not assume packaging or trade name determines classification.
- Read the HTSUS heading, subheading notes, chapter notes, and applicable General Rules of Interpretation in sequence.
- Ask a customs broker or classification specialist to review uncertain cases, especially for mixtures, formulated products, or products with multiple plausible descriptions.
HTS heading 2837 summary
Cyanides 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.
Sub-categories
| Code | Description |
|---|---|
| 2837.20 | Complex cyanides |
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 |
|---|---|---|---|---|
| 2837.11.00.00 👉 | Of sodium | Free | — | Free |
| 2837.19.01 👉 | Other | Free | — | Free |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2837?
Cyanides, cyanide oxides and complex cyanides. 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.