2937

Analysis

Heading 2937 of the Harmonized Tariff Schedule covers hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones. It divides into 9 six-digit subheadings and 17 eight-digit tariff lines, with 29 ten-digit statistical suffixes below them.

Every one of its 17 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.

Its median rate of duty-free sits at the 13th percentile of the headings in chapter 29.

The largest subheadings are 2937.90 (other, 6 lines), 2937.23 (estrogens and progestins, 3 lines), 2937.29 (other, 2 lines) and 2937.11 (unnamed, 1 line).

By Census's concordance, most of its statistical lines are made by Pharmaceutical Preparation Manufacturing (325412). Those are the NAICS industries a US producer of these goods would report under.

The heading text decides whether a product belongs here at all (General Rule of Interpretation 1); the subheadings and lines below it only apply once that is settled. Section and chapter notes can override the heading wording, so read them for borderline goods.