# 391310 — Natural polymers (for example, alginic acid) and modified natural polymers (for…: Alginic acid, its salts and esters

HS code 391310 classifies Natural polymers (for example, alginic acid) and modified natural polymers (for…: Alginic acid, its salts and esters. 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:** `391310`

## 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 : Alginic acid, its salts and esters

## Duty rates

| Country | Rate | Programme |
| --- | --- | --- |
| US United States | 4.2% | MFN |

Rates effective as of 2026-01-01.

---
Source: https://hscode.eximagent.ai/39/391310
Last updated: 2026-06-03
Find importers, tariffs and sanctions for 391310 with EximAgent — https://eximagent.ai