Carboxyimide-function compounds — HTS 2925
Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds
Chapter 29 › Heading 2925
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 2925 is a broad chemical category for compounds identified by certain nitrogen-containing functional groups: carboxyimide-function compounds, including saccharin and its salts, and imine-function compounds. It groups products by chemical structure rather than by brand, packaging, or intended industry alone. Products in this heading may be sold as laboratory chemicals, ingredients, intermediates, or other industrial materials.
To reach a specific U.S. 8-digit HTS code, start with the product’s chemical identity and then follow the heading’s subheadings and statistical breakouts. The lower-level descriptions commonly distinguish the compound’s type, such as a named chemical, a salt, or another chemical form. Confirm the applicable 6-digit subheading first, then select the complete 8-digit provision using the current HTS and the product’s exact composition and form.
What to check
- Obtain the product’s chemical name, CAS Registry Number, molecular formula, concentration, and safety data sheet before classifying it.
- Determine whether the product is a carboxyimide-function compound, saccharin or a saccharin salt, an imine-function compound, or another chemical covered by the heading.
- Check whether the merchandise is a pure compound, a salt, a solution, a mixture, or a preparation; concentration and added ingredients can affect classification.
- Read every subheading and 8-digit statistical description under heading 2925 rather than choosing the first description that sounds similar.
- Compare the proposed code with binding rulings, classification notes, and current HTS guidance; ask a customs broker or classification specialist when the chemical structure or mixture is uncertain.
HTS heading 2925 summary
Carboxyimide-function compounds is a 4-digit product category containing 3 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 |
|---|---|
| 2925.19 | Other |
| 2925.29 | 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 |
|---|---|---|---|---|
| 2925.11.00.00 👉 | Saccharin and its salts | 6.5% | Free | 15.4¢/kg + 61% |
| 2925.12.00.00 👉 | Glutethimide (INN) | Free | — | 15.4¢/kg + 61% |
| 2925.21.00.00 👉 | Chlordimeform (ISO) | 6.5% | Free | 15.4¢/kg + 61% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2925?
Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds. 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.