Nucleic acids and their salts — HTS 2934
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds
Chapter 29 › Heading 2934
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 2934 is a broad product category for certain organic chemical compounds. It covers nucleic acids and their salts, whether or not chemically defined, along with other heterocyclic compounds—chemical structures that contain a ring with at least one atom other than carbon, such as nitrogen, oxygen, or sulfur. The heading can therefore include very different materials, from defined chemical substances to other compounds grouped by their molecular structure.
A merchant narrows the heading to a specific 8-digit HTSUS code by identifying the product’s exact chemical identity and the subheading structure. The relevant distinction may depend on the compound’s material, chemical type, composition, or whether it is a nucleic acid, a salt, or another listed heterocyclic compound. Review the full legal description, section and chapter notes, and any applicable statistical suffix requirements; classification may require a customs broker or qualified chemist when the product’s identity or structure is unclear.
What to check
- Obtain the product’s chemical name, molecular formula, CAS Registry Number, composition, and technical data sheet before classifying it.
- Confirm whether the product is a nucleic acid, a salt of a nucleic acid, or another heterocyclic compound, and identify the relevant functional groups and ring structure.
- Read every heading, subheading, chapter note, and statistical suffix description rather than choosing a code from a broad product label or marketing name.
- Check whether the item is a pure compound, mixture, solution, preparation, or formulated product; those facts can affect classification elsewhere in the tariff.
- Have a customs broker, chemist, or other classification professional review uncertain cases, especially when the chemical identity, purity, or intended use could change the result.
HTS heading 2934 summary
Nucleic acids and their salts 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 |
|---|---|
| 2934.10 | Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure |
| 2934.20 | Compounds containing in the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused |
| 2934.30 | Compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused |
Common questions
What products fall under HTS heading 2934?
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic 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.