Borates — HTS 2840
Borates; peroxoborates (perborates)
Chapter 28 › Heading 2840
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 2840 is a four-digit product category for borates and peroxoborates, also called perborates. These are chemical compounds containing boron and oxygen in combination with other elements. The heading groups related chemical products, but it does not by itself identify the exact substance, formulation, or duty treatment.
To choose the correct eight-digit HTSUS code, start with the product’s precise chemical identity and determine whether it is a borate or a peroxoborate. The subheadings generally separate products by material or chemical type, such as the elements or compounds combined with the borate. Verify the full eight-digit description against the product’s composition, purity, physical form, and any stated exclusions or classification notes. A customs broker or qualified classification specialist may be needed for complex mixtures or chemically modified products.
What to check
- Obtain the product’s chemical name, molecular formula, CAS number, purity, and safety data sheet before classifying it.
- Confirm whether the item is a single chemical compound, a mixture, or a preparation; do not assume every boron-containing product belongs in heading 2840.
- Read the subheading descriptions and legal notes to match the product’s specific material or chemical type, then continue to the complete eight-digit code.
- Check whether the product is a peroxoborate or an ordinary borate, and verify that its physical form or formulation does not direct it to another heading.
- Document the classification reasoning and request broker or customs guidance when the composition, concentration, or intended use creates uncertainty.
HTS heading 2840 summary
Borates is a 4-digit product category containing 4 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 |
|---|---|---|---|---|
| 2840.11.00.00 👉 | Anhydrous | 0.3% | Free | 1.2% |
| 2840.19.00.00 👉 | Other | 0.1% | Free | 0.4% |
| 2840.20.00.00 👉 | Other borates | 3.7% | Free | 25% |
| 2840.30.00 👉 | Peroxoborates (perborates) | 3.7% | 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 2840?
Borates; peroxoborates (perborates). 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.