Hydroxide and peroxide of magnesium — HTS 2816
Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium
Chapter 28 › Heading 2816
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 2816 is a 4-digit product category for certain inorganic chemical compounds. It groups together magnesium hydroxide and magnesium peroxide, plus the oxides, hydroxides, and peroxides of strontium or barium. These are different chemical forms, so the heading is organized around both the element involved and the compound’s chemical type.
A merchant normally narrows the heading to a specific 8-digit HTSUS code by identifying the exact substance and its form—for example, whether it is a magnesium compound or a strontium or barium compound, and whether it is an oxide, hydroxide, or peroxide. Product specifications, chemical names, formulas, concentration, and any applicable subheading descriptions help determine the correct selection. The final classification may require customs-broker or other professional judgment.
What to check
- Check the product’s exact chemical name, formula, and CAS information against the heading and subheading descriptions.
- Confirm whether the substance is an oxide, hydroxide, or peroxide, and identify the relevant element: magnesium, strontium, or barium.
- Review the product’s safety data sheet, technical data sheet, certificate of analysis, and composition details for classification evidence.
- Do not classify from a marketing name alone; check whether mixtures, preparations, solutions, or specially formulated products may be covered elsewhere.
- Verify the complete 8-digit HTSUS code in current official tariff data and seek broker advice when the chemistry or product form is unclear.
HTS heading 2816 summary
Hydroxide and peroxide of magnesium 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 |
|---|---|
| 2816.40 | Oxides, hydroxides and peroxides, of strontium or barium |
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 |
|---|---|---|---|---|
| 2816.10.00.00 👉 | Hydroxide and peroxide of magnesium | 3.1% | 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 2816?
Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium. 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.