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HTS code reference›Chapter 39: Plastics and articles thereof›3913.90

HTS Code 3913.90

Other:

Official tariff path

Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms: › Other:

Level: hs6General duty: Varies / see child provision

What does HTS 3913.90 cover?

This provision appears in the 2026 Harmonized Tariff Schedule of the United States under the following legal tariff hierarchy. A product must match the wording and applicable section or chapter notes before this code is used on an entry.

  1. 1Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms:
  2. 2Other:

More specific provisions

3913.90.10.00Chemical derivatives of natural rubber3913.90.20Polysaccharides and their derivatives3913.90.50.00Other

Nearby tariff provisions

3913.10.00.00Alginic acid, its salts and esters
Official source and limitations

Based on USITC HTS 2026 Revision 12, published July 21, 2026. The general rate does not include every origin-specific program, Section 301 or 232 measure, antidumping or countervailing duty, quota, or other agency requirement.

Open this code in the official USITC search ↗