Phosphinates — HTS 2835
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined
Chapter 28 › Heading 2835
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 2835 is a broad product category for certain inorganic phosphorus compounds and their salts. It groups phosphinates (also called hypophosphites), phosphonates (also called phosphites), phosphates, and polyphosphates, including products that may be chemically defined or mixtures covered by a more specific provision. These substances are commonly sold as chemicals, additives, treatment agents, or industrial materials.
A 4-digit heading is only the starting point, not the final classification. To reach the correct 8-digit HTS code, first identify the compound’s chemical identity and form, then follow the subheadings and tariff descriptions under heading 2835. The narrower provisions commonly distinguish the material or chemical type—for example, a particular salt, compound, or polyphosphate—so the product’s exact composition and intended description matter. The HTS notes, General Rules of Interpretation, and any relevant subheading notes control when the wording is unclear.
What to check
- Obtain the product’s complete chemical name, formula, concentration, and specification sheet; do not rely only on a trade name.
- Determine whether the product is a phosphinate, phosphonate, phosphate, or polyphosphate, and identify the relevant cation or salt where applicable.
- Check whether the product is a single chemically defined compound, a mixture, a solution, or a preparation; packaging and formulation can affect classification.
- Read every subheading under heading 2835 and compare the wording with the product’s actual composition, not just its commercial use.
- Confirm the result against the current official HTS, applicable legal notes, and—when the chemistry or mixture is complex—a licensed customs broker or binding-ruling process.
HTS heading 2835 summary
Phosphinates 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.
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 |
|---|---|---|---|---|
| 2835.10.00.00 👉 | Phosphinates (hypophosphites) and phosphonates (phosphites) | 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 2835?
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined. 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.