Ethers — HTS 2909
Ethers, ether-alcohols, ether-phenols, ether-alcohol- phenols, alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides (whether or not chemically defined), and their halogenated, sulfonated, nitrated or nitrosated derivatives
Chapter 29 › Heading 2909
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 2909 is a four-digit product category for several kinds of oxygen-based organic chemicals. It groups ethers and related compounds, including ether-alcohols, ether-phenols, ether-alcohol-phenols, various organic peroxides, and certain chemically modified derivatives that are halogenated, sulfonated, nitrated, or nitrosated. The heading can cover both chemically defined substances and, where the heading says so, certain ketone peroxide products that are not chemically defined.
To narrow a product to an eight-digit HTSUS code, first confirm that its chemical identity and composition place it in heading 2909. Then follow the heading’s subheadings and statistical provisions, which commonly distinguish products by chemical type, structure, derivative status, or whether the material is chemically defined. The product’s exact formulation, concentration, and presentation may matter; classification should be based on the legal wording and applicable HTSUS notes, not merely a trade name or marketing description.
What to check
- Obtain the product’s chemical name, CAS Registry Number, structural or molecular information, and complete formulation from the safety data sheet and supplier.
- Determine whether the material is an ether, ether-alcohol, ether-phenol, ether-alcohol-phenol, peroxide, or a listed derivative, and check whether it is chemically defined.
- Read the heading, subheading, section notes, chapter notes, and any relevant legal notes in the current HTSUS before selecting the eight-digit code.
- Check whether mixtures, solutions, stabilizers, impurities, or carrier solvents change the product’s classification or move it to another heading.
- Compare the proposed code with official customs rulings and seek a binding classification ruling or qualified customs-broker advice when the chemistry or formulation is uncertain.
HTS heading 2909 summary
Ethers is a 4-digit product category containing 2 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 |
|---|---|
| 2909.19 | Other |
| 2909.30 | Aromatic ethers and their halogenated, sulfonated, nitrated or nitrosated derivatives |
| 2909.50 | Ether-phenols, ether-alcohol-phenols and their halogenated, sulfonated, nitrated or nitrosated derivatives |
| 2909.60 | Alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides and their halogenated, sulfonated, nitrated or nitrosated derivatives |
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 |
|---|---|---|---|---|
| 2909.11.00.00 👉 | Diethyl ether | 1% | Free | 4% |
| 2909.20.00.00 👉 | Cyclanic, cyclenic or cycloterpenic ethers and their halogenated, sulfonated, nitrated or nitrosated derivatives | 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 2909?
Ethers, ether-alcohols, ether-phenols, ether-alcohol- phenols, alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides (whether or not chemically defined), and their halogenated, sulfonated, nitrated or nitrosated derivatives. 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.