What HS code 3913.90 covers
HS code 3913.90 classifies polymers, natural and modified natural; in primary forms (excluding alginic acid, its salts and esters). It is a subheading of heading 3913 (Natural polymers (e.g. alginic acid) and modified natural polymers (e.g. hardened proteins, chemical derivatives of natural rubber), n.e.c. or included, in primary forms), in chapter 39 (Plastics and articles thereof), section VII of the Harmonized System. These six digits are identical in every country that uses the HS.
Classification path
Import duty for 3913.90
Base MFN rate only. Section 301 and 2025 IEEPA tariffs can stack on top for goods from China.
Source: HTSUS / CBP
Erga-omnes (third-country) MFN rate. Import VAT of 17 to 27 percent by country, and any anti-dumping measures, apply separately.
Source: TARIC
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Courts voided some of the tariffs importers paid on goods like this. You may be owed money back. The audit is free and we only get paid when you do.
Related codes in heading 3913
Not quite the right fit? These subheadings sit under the same heading and are the most common alternatives to 3913.90.
Confirm the code for your exact product
A 6-digit subheading still covers a range of products. The wrong code at the border can mean overpaying duty, a delayed shipment, or a penalty. Describe your exact item and HS Mate confirms whether 3913.90 is right, with the duty rate and an audit trail your customs broker can accept.