Zinc dust — HTS 7903
Zinc dust, powders and flakes
Chapter 79 › Heading 7903
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 7903 is a 4-digit product category for zinc in finely divided forms: zinc dust, zinc powders, and zinc flakes. It groups these products together based mainly on their physical form and composition, rather than their brand, intended customer, or packaging.
To reach the correct 8-digit HTSUS code, first confirm that the item is zinc dust, powder, or flakes—not a zinc article, alloy product, chemical compound, or other zinc form classified elsewhere. Then use the more detailed subheadings, which generally distinguish the product by its type or characteristics. The product’s technical specifications, manufacturing method, and exact zinc composition may be important; when those facts do not clearly match a subheading, a customs broker or classification specialist may be needed.
What to check
- Obtain the supplier’s technical data sheet, certificate of analysis, and product description, including zinc content and physical form.
- Determine whether the material is dust, powder, or flakes, and document how the supplier defines that form.
- Check whether the product is pure zinc or an alloy, mixture, coating material, or chemical preparation that may require classification outside heading 7903.
- Compare the product’s composition and manufacturing details with the wording of each applicable 8-digit HTSUS subheading and its legal notes.
- Keep records supporting the classification, and ask a customs broker or request a binding classification ruling if the product could fit more than one code.
HTS heading 7903 summary
Zinc dust is a 4-digit product category containing 1 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 |
|---|---|
| 7903.90 | Other |
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 |
|---|---|---|---|---|
| 7903.10.00.00 👉 | Zinc dust | 0.7¢/kg | Free | 3.9¢/kg |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 7903?
Zinc dust, powders and flakes. 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.