Sao Tome and Principe HS Code

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 in Sao Tome and Principe

Q: Is HS code 391310 the same across all countries?

Yes — up to the 6-digit level, HS code 391310 is the same in every WCO member country. Beyond 6 digits, each country extends the code for national tariff and statistical use. Sao Tome and Principe extends it under HS-ST.

Q: What system does Sao Tome and Principe use to classify HS code 391310?

Sao Tome and Principe classifies products under the Pauta Aduaneira (HS-ST; locally Pauta Aduaneira), which extends HS codes to 8 digits. The first 6 digits align with the WCO Harmonized System, and the rest cover national tariff and statistical needs.

Q: Where can I officially look up HS code 391310 in Sao Tome and Principe?

The official source is https://www.alfandegas.gov.st/. For faster cross-country lookups, TradeInt's HS Code Tool consolidates classifications across all major countries in one place.

What is HS Code 391310 in Sao Tome and Principe

Under Sao Tome and Principe's Pauta Aduaneira (Pauta Aduaneira), HS Code 391310 is the WCO Harmonized System subheading 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 : Alginic acid, its salts and esters. This is the most detailed internationally standardized level; Sao Tome and Principe extends classifications to 8 digits under its national tariff system. 391310 belongs to Section VII: Plastics and articles thereof; rubber and articles thereof, Chapter 39: Plastics and articles thereof, Heading 3913: 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.

Explore more 2026 Latest Sao Tome and Principe import export trade data and shipment records for HS Code Alginic Acid and Salts on TradeInt global trade data platform

Classification Path of HS Code 391310 in Sao Tome and Principe

Section VII

Chapters (39-40) Plastics and articles thereof; rubber and articles thereof

Chapter 39

Plastics and articles thereof

HS Code 3913

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

HS Code 391310

HS Code 39131000

Polímeros naturais (ácido algínico, por exemplo) e polímeros naturais modificados (por exemplo, proteínas endurecidas, derivados químicos da borracha natural), não especificados nem compreendidos noutras posições, em formas primárias: Ácido algínico, seus sais e seus ésteres

Sao Tome and Principe Tariff Classification: Pauta Aduaneira (HS-ST)

In Sao Tome and Principe, HS 391310 is classified under the Pauta Aduaneira (Pauta Aduaneira) — a 8-digit national extension of the WCO 6-digit Harmonized System.

Tariff schedule Pauta Aduaneira (HS-ST)

Local name Pauta Aduaneira

Digits 8

Official source https://www.alfandegas.gov.st/

You know what 391310 means. Now see 2026 latest real trade activity for Alginic Acid and Salts in Sao Tome and Principe.

Buyers, suppliers, origin and destination countries, shipment dates, and quantities direct from customs records.

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Top Trading Product of HS Code 3913

Top Sao Tome and Principe import Product Under HS Code 3913

1 391390: Other $4.4K

Figures shown for 2023.

For more 2026 recent data, search for Sao Tome and Principe import trade records

Related HS Code to Sao Tome and Principe Alginic Acid and Salts (391310)

HS Code 39131000

HS Code 391390

HS Code 390110

Polymers of ethylene, in primary forms : Polyethylene having a specific gravity of less than 0,94

HS Code 390120

Polymers of ethylene, in primary forms : Polyethylene having a specific gravity of 0,94 or more

HS Code 390130

Polymers of ethylene, in primary forms : Ethylenevinyl acetate copolymers

HS Code 390140

Polymers of ethylene, in primary forms : Ethylenealphaolefins copolymers, having a specific gravity of less than 0,94

HS Code 390190

Polymers of ethylene, in primary forms : Other

HS Code 390210

Polymers of propylene or of other olefins, in primary forms : Polypropylene

HS Code 390220

Polymers of propylene or of other olefins, in primary forms : Polyisobutylene

HS Code 390230

Polymers of propylene or of other olefins, in primary forms : Propylene copolymers

Frequently Asked Questions

What is HS code 391310 in Sao Tome and Principe?

HS code 391310 covers 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 in Sao Tome and Principe. It sits in Chapter 39 (Plastics and articles thereof), Heading 3913 of the Harmonized System, and is classified under HS-ST.

Is HS code 391310 the same across all countries?

What system does Sao Tome and Principe use to classify HS code 391310?

Where can I officially look up HS code 391310 in Sao Tome and Principe?