Aldehydes — HTS 2912
Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde
Chapter 29 › Heading 2912
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 2912 is a broad product category for aldehydes and certain related products. It includes aldehydes with or without another oxygen function, such as an alcohol, ether, or acid function, as well as cyclic polymers of aldehydes and paraformaldehyde. An aldehyde is an organic chemical identified by its functional group; the heading covers multiple chemical families rather than one single product.
To reach the correct 8-digit HTSUS code, start with the product’s chemical identity and then follow the applicable subheading structure. Classification commonly turns on the specific material or type—for example, whether it is an acyclic or cyclic compound, a polymer, paraformaldehyde, or an aldehyde combined with another oxygen function. The product’s composition, chemical name, formulation, and intended condition may also affect the result. Confirm the full code in the current HTSUS and obtain customs-broker or ruling advice when the chemistry is unclear.
What to check
- Identify the exact chemical substance, including its systematic name, CAS Registry Number, and molecular formula.
- Check whether the product is an individual aldehyde, an aldehyde with another oxygen function, a cyclic polymer, or paraformaldehyde.
- Review the relevant 6-digit and 8-digit subheadings for distinctions based on chemical type, structure, or composition.
- Compare the HTSUS wording with the safety data sheet, technical data sheet, specification sheet, and product label.
- Ask a qualified customs broker or seek a formal classification ruling if the product is a mixture, solution, derivative, or chemically ambiguous.
HTS heading 2912 summary
Aldehydes is a 4-digit product category containing 6 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 |
|---|---|
| 2912.19 | Other |
| 2912.29 | Other |
| 2912.49 | Other |
| 2912.50 | Cyclic polymers of aldehydes |
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 |
|---|---|---|---|---|
| 2912.11.00.00 👉 | Methanal (Formaldehyde) | 2.8% | Free | 12.1% |
| 2912.12.00.00 👉 | Ethanal (Acetaldehyde) | 5.5% | Free | 71% |
| 2912.21.00.00 👉 | Benzaldehyde | 5.5% | Free | 15.4¢/kg + 45% |
| 2912.41.00.00 👉 | Vanillin (4-Hydroxy-3-methoxybenzaldehyde) | 5.5% | Free | 15.4¢/kg +48% |
| 2912.42.00.00 👉 | Ethylvanillin (3-Ethoxy-4-hydroxybenzaldehyde) | 5.5% | Free | 15.4¢/kg +80% |
| 2912.60.00.00 👉 | Paraformaldehyde | 5.1% | Free | 32.5% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2912?
Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde. 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.