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:
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:
Level: headingGeneral duty: Varies / see child provision
What does HTS 3913 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.
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:
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.