Sulfides — HTS 2830
Sulfides; polysulfides, whether or not chemically defined
Chapter 28 › Heading 2830
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 2830 is a broad product category for sulfides and polysulfides, whether or not they are chemically defined. In general, it covers inorganic chemical compounds in which sulfur is combined with another element or group of elements. A sulfide has sulfur in the compound; a polysulfide contains chains or combinations involving multiple sulfur atoms. The heading is about the chemical product itself, not simply any product that happens to contain sulfur.
To narrow this 4-digit heading to an 8-digit HTSUS code, use the product’s chemical identity and the tariff wording under the relevant subheading. The more specific code may distinguish a particular metal or compound, a defined chemical composition, or an “other” category. Confirm the product’s formula, CAS Registry Number, purity, physical form, and whether it is a sulfide or polysulfide, then compare those facts with the current HTSUS descriptions and any applicable chapter notes. If the wording is unclear or competing classifications are possible, obtain customs-broker or binding-ruling guidance.
What to check
- Identify the exact chemical name, formula, CAS Registry Number, and whether the product is a sulfide or polysulfide.
- Check the compound’s principal element or metal and compare it with the specific subheadings listed beneath heading 2830.
- Verify whether the product is chemically defined, a mixture, a preparation, or a solution; related products may belong in another heading.
- Review the product’s specification sheet and safety data sheet, but do not rely on marketing names alone.
- Confirm the complete 8-digit HTSUS code in the current official tariff and seek broker advice when the chemical identity or tariff wording is uncertain.
HTS heading 2830 summary
Sulfides 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 |
|---|---|
| 2830.90 | 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 |
|---|---|---|---|---|
| 2830.10.00.00 👉 | Sodium sulfides | 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 2830?
Sulfides; polysulfides, 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.