Analysis
Subheading 2933.52 covers malonylurea (Barbituric acid) and its salts, within heading 2933. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 2 US tariff lines below it are national.
Every one of its 2 tariff lines is duty-free at the general rate, so classification within the subheading affects statistics and Chapter 99 measures rather than the base duty.
The US splits it as follows: 2933.52.10 for malonylurea (barbituric acid) (duty-free) and 2933.52.90 for malonylurea (Barbituric acid) and its salts: other (duty-free).
By Census's concordance, most of its statistical lines are made by All Other Basic Organic Chemical Manufacturing (325199). Those are the NAICS industries a US producer of these goods would report under.
Goods only reach 2933.52 once they fall within heading 2933 (heterocyclic compounds with nitrogen hetero-atom(s) only). Under General Rule 6, subheadings are then compared only with others at the same level, so a product is matched against its siblings, not against lines elsewhere in the chapter.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 2933.52.10 | Malonylurea (barbituric acid) | Free |
| 2933.52.90 | Malonylurea (Barbituric acid) and its salts: other | Free |