Prepared rubber accelerators — HTS 3812
Prepared rubber accelerators; compound plasticizers for rubber or plastics, not elsewhere specified or included; antioxidizing preparations and other compound stabilizers for rubber or plastics
Chapter 38 › Heading 3812
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 3812 is a broad product category for certain chemical preparations used with rubber or plastics. It groups together prepared rubber accelerators, compound plasticizers not classified elsewhere, and antioxidizing preparations and other compound stabilizers for rubber or plastics. These are generally formulated mixtures or preparations, rather than the basic chemical substances themselves.
To narrow a product to an 8-digit HTS code, first identify its principal function and the material it is designed to treat. The subheading structure commonly separates rubber accelerators from plasticizers and stabilizers, then distinguishes products by formulation or intended use. Review the legal descriptions, section and chapter notes, and any applicable classification guidance; the product’s ingredients, technical function, and presentation may all matter. A customs broker or classification specialist may be needed for borderline products.
What to check
- Obtain the complete ingredient list, safety data sheet, technical data sheet, and product specification.
- Determine whether the product is primarily a rubber accelerator, compound plasticizer, antioxidant, or another stabilizer.
- Confirm whether the preparation is intended for rubber, plastics, or both, and identify its principal technical function.
- Compare the product’s formulation and physical form with the full descriptions and exclusions for the relevant 8-digit subheadings.
- Check the current official HTS text and seek broker or specialist advice if the product could fit more than one subheading.
HTS heading 3812 summary
Prepared rubber accelerators 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 |
|---|---|
| 3812.10 | Prepared rubber accelerators |
| 3812.20 | Compound plasticizers for rubber or plastics |
Common questions
What products fall under HTS heading 3812?
Prepared rubber accelerators; compound plasticizers for rubber or plastics, not elsewhere specified or included; antioxidizing preparations and other compound stabilizers for rubber or plastics. 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.