Niacin and niacinamide
Classified under heading 2936 / subheading 2936.29 — chapter 29 of the US Harmonized Tariff Schedule.
General rate applies to goods from countries with normal trade relations. Special rates require a program code (USMCA, GSP, AGOA…). Column 2 applies where normal trade relations do not.
Duty calculator
Estimate the duty owed on an import under HTS 2936.29.16.
Excludes merchandise processing fees, Section 301 duties, antidumping/countervailing duties and freight. Estimates only — not customs advice.
Where this rate sits
Heading 2936 contains 3 tariff lines. The general rate on this line is duty-free.
| Metric | This line | Heading 2936 |
|---|---|---|
| General rate | Free | avg 0% |
| Duty-free lines | yes | 3 of 3 |
| Specific-rate lines | no | 0 |
Classification path
- 2936Provitamins and vitamins, natural or reproduced by synthesis (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the foregoing, whether or not in any solvent
- 2936.29Other vitamins and their derivatives
- 2936.29.16Niacin and niacinamide
All 3 tariff lines under heading 2936
Heading overview →| HTS code | Description | General | Col. 2 |
|---|---|---|---|
| 2936.29.16 | Niacin and niacinamidethis page | Free | 25% |
| 2936.29.50 | Other | Free | 25% |
| 2936.90.01 | Other, including provitamins and natural concentrates | Free | 25% |
Using HTS 2936.29.16 correctly
A ten-digit HTS number has three parts: the four-digit heading, the six-digit international subheading shared by every WTO member, and the two-digit US statistical suffix. 2936.29.16 is a US national line — the same product may carry a different suffix in the EU TARIC or in another country's tariff.
Classification is determined by the General Rules of Interpretation, not by what the product is called on the invoice. If your goods could fall in two headings, GRI 1 sends you to the heading with the most specific description; GRI 3 breaks ties by essential character. A GRI 3(b) mistake is the single most common reason an entry gets reclassified and billed for unpaid duty plus interest.