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.
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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
US MFN base rate (HTS 2026, Column-1 General) — excludes Section 301 / IEEPA add-ons; not legal advice. Other countries’ rates and live duties via the EximAgent CLI.
- USUnited States4.2%MFNas of Jan 1, 2026
Common questions
- What is HS code 391310?
- 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
- What duty rates apply to 391310?
- Listed duty rates range from 4.2% across 1 country rate.
Browse all of Chapter 39: Plastics and articles thereof →
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Find the companies shipping under 391310 — ranked by shipments recorded in US customs filings over the last 12 months.