Heading 3903 · Polymers of styrene, in primary forms

3903.90

Polymers of styrene, in primary forms — Other:

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Mentioned in Chapter 99

The parts of Chapter 99, in the 2026 HTS Revision 22, that list HTS 3903.90, a broader code that includes it, or a narrower code within it.

U.S. noteExcerptHeadings that refer to it
U.S. note 20(d)(d) Heading 9903.88.02 applies to all products of China that are classified in the following 8-digit subheadings, except products of China granted an exclusion by the U.S. Trade Representative and provided for in (1) heading 9903.88.12 and…9903.88.02

Being listed is not owing a duty. A note may list goods that a measure leaves out; whether a heading applies depends on the origin, the date and the product; and the measures on all the goods of a country list no code at all. The calculator says what applies.

In the tariff

  1. 3903Polymers of styrene, in primary forms
  2. 3903.90Other
  3. 3903.90.10.00Methyl methacrylate-butadiene-styrene (MBS) copolymers6.5%
  4. 3903.90.50.00Other6.5%