2936.29.16 - Niacin and niacinamide

This HTS subheading covers niacin and niacinamide, which are essential B vitamins. Niacin, also known as nicotinic acid, and niacinamide, also known as nicotinamide, are primarily classified here when presented unmixed and not as part of a provitamin or vitamin concentrate. These compounds are vital for various metabolic processes and are commonly used in dietary supplements, pharmaceuticals, and food fortification.

This category is distinguished from its sibling, 2936.29.10.00 (Folic acid), by the specific identity of the vitamin. While both fall under "Other vitamins and their derivatives," 2936.29.10.00 is exclusively for folic acid, whereas this subheading encompasses the distinct chemical entities of niacin and niacinamide.

Within this classification, further subdivisions exist to specify niacinamide. The existence of a separate subheading for niacinamide indicates a recognition of its specific chemical structure and, potentially, differing regulatory or commercial considerations compared to pure niacin. This allows for more precise tariff application based on the specific form of the vitamin being imported or exported.