# 391390 — Natural polymers (for example, alginic acid) and modified natural polymers (for…: Other

HS code 391390 classifies Natural polymers (for example, alginic acid) and modified natural polymers (for…: Other. It belongs to Chapter 39 (Plastics and articles thereof) of Section VII (Plastics and articles thereof; rubber and articles thereof) of the Harmonized System. Duty rates are recorded for 1 country.

> Section VII · Plastics and articles thereof; rubber and articles thereof
> Chapter 39 · Plastics and articles thereof

**HS code:** `391390`

## Description

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

## Duty rates

| Country | Rate | Programme |
| --- | --- | --- |
| US United States | Free–6.5% | MFN |

Rates effective as of 2026-01-01.

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Source: https://hscode.eximagent.ai/39/391390
Last updated: 2026-06-03
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