2936.29.16
8-digit subheadingNiacin and niacinamide
This is a 8-digit subheading — a category, not a filing code. Pick the more specific code beneath it that best matches your goods; only a 10-digit statistical code can be used on a customs entry.
Duty rates
Duty-free under this rate column.
| Rate | Value and what it means |
|---|---|
| General rate (Column 1) | FreeColumn 1 general Applies to most trading partners — the standard "normal trade relations" rate. |
| Special rate (Column 1) | —Trade programs The country letters in parentheses are free trade agreement and preference programs. If your goods qualify under one of them, that rate replaces the general rate. |
| Column 2 rate | 25%Non-NTR Reserved for the small group of countries that do not have normal trade relations with the US (currently Cuba, North Korea, Russia and Belarus). Almost no importer uses this column — if you are shipping from anywhere else, ignore it. |
| Unit of quantity | — How CBP expects the quantity to be reported on the entry summary. |
Where this sits in the schedule
The tariff schedule is read top-down: each line inherits the wording of the categories above it.
Provitamins 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: > Vitamins and their derivatives, unmixed: > Other vitamins and their derivatives:
Codes within Niacin and niacinamide
3 more specific lines fall under 2936.29.16.
- 2936.29.16.10Pharmaceutical grade10-digit statistical codeProvitamins 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: > Vitamins and their derivatives, unmixed: > Other vitamins and their derivatives: > Niacin and niacinamide > Niacin:
- 2936.29.16.20Other10-digit statistical codeProvitamins 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: > Vitamins and their derivatives, unmixed: > Other vitamins and their derivatives: > Niacin and niacinamide > Niacin:
- 2936.29.16.30Niacinamide10-digit statistical codeProvitamins 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: > Vitamins and their derivatives, unmixed: > Other vitamins and their derivatives: > Niacin and niacinamide
Chapter 29: Organic Chemicals
Browse every code in this chapter to compare neighbouring classifications.
View Chapter 29Source: USITC Harmonized Tariff Schedule, 2026 Basic Edition, Revision 16. Rate text is reproduced verbatim from the official export; category paths and duty estimates are derived.
Data loaded August 18, 2026.Check this chapter on hts.usitc.govReport an error with this codeHow this data is built