HS 3913 — 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

HS heading 3913 (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) spans 2 products in U.S. import records, with 3,318 bill-of-lading shipments. The most imported are 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 and Alginic acid, its salts and esters.

Part of Chapter 39: Plastics and articles thereof

Sourced from U.S. Customs bill of lading data · Updated monthly · Data through May 2026