HTS tariff line · chapter 31
3101.00.00
Animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or vegetable products
Analysis
HTS 3101.00.00 covers animal or vegetable fertilizers, whether or not mixed together or chemically treated; fertilizers produced by the mixing or chemical treatment of animal or… under heading 3101 (animal or vegetable fertilizers, whether or not mixed together or chemically treated…).
There is no general-rate duty on this line, which puts it with roughly 100% of the 24 tariff lines in chapter 31 that are also free. Duty-free at the general rate does not rule out additional duties under Chapter 99, such as Section 301 or Section 232 measures, which depend on the country of origin.
It is the only US line under subheading 3101.00, so the six-digit code used by every Harmonized System country and the eight-digit US line describe the same goods; a foreign tariff or an exporter's invoice showing 3101.00 points straight here.
Census statistics map these goods to NAICS 325311 (Nitrogenous Fertilizer Manufacturing), an industry of 194 US establishments employing 7,033 people, the industry a domestic producer of these goods reports under.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.