3913.90.50.00—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
HTS 3913.90.50.00 is the U.S. Harmonized Tariff Schedule classification for 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. It's a 10-digit statistical line in Chapter 39: Plastics and articles thereof, Section VII: Plastics and Articles Thereof; Rubber and Articles Thereof, used by U.S. Customs and Border Protection to determine the duty rate at entry. No Chapter 99 tariff modifications (Section 301, Section 232, IEEPA) or AD/CVD orders currently flag this code in Tandom's catalog.
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
HTS 3913.90.50.00 is the U.S. Harmonized Tariff Schedule classification for 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. It belongs to Chapter 39 of the HTSUS.
What is the general duty rate for HTS 3913.90.50.00?
The general (Column 1) duty rate for HTS 3913.90.50.00 is 6.5%. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
Are there preferential or trade-program rates for HTS 3913.90.50.00?
Yes. Imports of HTS 3913.90.50.00 from countries party to a trade program (such as USMCA, KORUS, GSP, or the African Growth and Opportunity Act) may qualify for the special rate: Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG). Eligibility depends on rules of origin and certification.
What is the Column 2 (statutory) rate for HTS 3913.90.50.00?
The Column 2 rate for HTS 3913.90.50.00 is 2.2¢/kg + 33.5%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
Are there Section 301 or Section 232 tariffs on HTS 3913.90.50.00?
No active Chapter 99 tariff overlays (Section 301, Section 232, IEEPA reciprocal, etc.) currently flag HTS 3913.90.50.00 in Tandom's catalog. Use the calculator's date + origin inputs to confirm against any retroactive overlay you may be filing.
Does HTS 3913.90.50.00 have any antidumping or countervailing duty (AD/CVD) orders?
No active AD/CVD orders currently flag HTS 3913.90.50.00 in Tandom's catalog. Tandom monitors Federal Register notices daily; a flag will appear here within 24h of any new order's publication.
Trade programs(16)
Free Trade Agreement and special-program eligibility