Casein — HTS 3501
Casein, caseinates and other casein derivatives; casein glues
Chapter 35 › Heading 3501
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 3501 is a broad product category for casein-based materials and certain products made from them. It covers casein itself, caseinates (salts or compounds of casein), other casein derivatives, and casein glues. Casein is a milk protein, but a product’s classification depends on its form, composition, and intended use—not simply on the fact that it is dairy-derived.
To reach the correct 8-digit HTSUS code, start with the heading and then read the 6-digit subheading and 8-digit statistical breakout. The narrower options generally distinguish the material or product type, such as casein, a caseinate or other derivative, or casein glue. Review the legal wording, section and chapter notes, and any relevant explanatory guidance; a customs broker or classification specialist may be needed for unusual formulations or mixtures.
What to check
- Identify whether the product is casein, a caseinate, another casein derivative, or a casein glue before comparing subheadings.
- Review the product’s full formulation, including additives, moisture content, salts, and other ingredients, and obtain the technical specification or safety data sheet.
- Check the product’s physical form and intended use, such as food, industrial, laboratory, or adhesive use, against the wording of the candidate 8-digit provisions.
- Confirm whether another HTS chapter or heading more specifically describes a prepared mixture, finished product, or adhesive, rather than assuming all casein-based goods belong in heading 3501.
- Use the current HTSUS text and official classification guidance, and request broker or customs-ruling advice when the formulation or use creates uncertainty.
HTS heading 3501 summary
Casein is a 4-digit product category containing 0 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 |
|---|---|
| 3501.10 | Casein |
| 3501.90 | Other |
Common questions
What products fall under HTS heading 3501?
Casein, caseinates and other casein derivatives; casein glues. 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.