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 3,963 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 August 2026Cite as: ImportDoor, U.S. Customs bill of lading data (data through August 2026), https://www.importdoor.com/products/heading/3913
Products under this heading
Frequently asked questions about HS 3913
What is HS code 3913?
HS 3913 covers natural polymers and modified natural polymers. It is a 4-digit heading in chapter 39 (Plastics and articles thereof) of the Harmonized System, with 2 six-digit subheadings that appear in U.S. import records.
How many U.S. import shipments fall under HS 3913?
ImportDoor has 3,963 U.S. Customs bill-of-lading shipment records under HS heading 3913, updated monthly.
What is the most imported product under HS 3913?
Natural polymers and modified natural polymers (HS 391390) leads with 3,512 shipments, followed by Alginic acid, its salts and esters (HS 391310).