Sao Tome and Principe HS Code

HS Code 290431: Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Perfluorooctane sulphonic acid in Sao Tome and Principe

Q: Is HS code 290431 the same across all countries?

Yes — up to the 6-digit level, HS code 290431 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 290431?

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 290431 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 290431 in Sao Tome and Principe

Under Sao Tome and Principe's Pauta Aduaneira (Pauta Aduaneira), HS Code 290431 is the WCO Harmonized System subheading for Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Perfluorooctane sulphonic acid. This is the most detailed internationally standardized level; Sao Tome and Principe extends classifications to 8 digits under its national tariff system. 290431 belongs to Section VI: Products of the chemical or allied industries, Chapter 29: Organic chemicals, Heading 2904: Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated.

Explore more 2026 Latest Sao Tome and Principe import export trade data and shipment records for HS Code Perfluorooctane Sulphonic Acid (PFOS) on TradeInt global trade data platform

Classification Path of HS Code 290431 in Sao Tome and Principe

Section VI

Chapters (28-38) Products of the chemical or allied industries

Chapter 29

Organic chemicals

HS Code 2904

Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated

HS Code 290431

Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Perfluorooctane sulphonic acid

HS Code 29043100

Derivados sulfonados, nitrados ou nitrosados dos hidrocarbonetos, mesmo halogenados: Ácido perfluorooctano sulfónico, seus sais e fluoreto de perfluorooctanossulfonilo: Ácido perfluorooctano sulfónico

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

In Sao Tome and Principe, HS 290431 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/

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Related HS Code to Sao Tome and Principe Perfluorooctane Sulphonic Acid (PFOS) (290431)

HS Code 29043100

HS Code 290410

Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Derivatives containing only sulpho groups, their salts and ethyl esters

HS Code 290420

Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Derivatives containing only nitro or only nitroso groups

Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Other : Trichloronitromethane (chloropicrin)

HS Code 290499

Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Other : Other

Frequently Asked Questions

What is HS code 290431 in Sao Tome and Principe?

HS code 290431 covers Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated : Perfluorooctane sulphonic acid, its salts and perfluorooctane sulphonyl fluoride : Perfluorooctane sulphonic acid in Sao Tome and Principe. It sits in Chapter 29 (Organic chemicals), Heading 2904 of the Harmonized System, and is classified under HS-ST.

Is HS code 290431 the same across all countries?

What system does Sao Tome and Principe use to classify HS code 290431?

Where can I officially look up HS code 290431 in Sao Tome and Principe?