HS code · 6-digit subheading

HS Code 3911.90 – Polysulphides, polysulphones and similar products of chemical synthesis n.e.c. in chapter 39; in primary forms

HS code 3911.90 is the 6-digit subheading for polysulphides, polysulphones and similar products of chemical synthesis n.e.c. in chapter 39, in primary forms. It is used for polysulphide polymers, polysulphone (PSU) granules, polyethersulphone (PES) powder, polyphenylsulphone (PPSU) pellets and polyketones.

What HS 3911.90 covers

This 'basket' code covers a variety of specialized synthetic polymers in primary forms not elsewhere specified in Chapter 39, specifically highlighting polysulphides and polysulphones. These high-performance polymers are known for their excellent chemical resistance, high-temperature stability, and mechanical strength. Polysulphides are often used in sealants, adhesives, and coatings, particularly in aerospace and construction, due to their flexibility and solvent resistance. Polysulphones find applications in membranes, medical devices, and electrical components due to their toughness, transparency, and ability to withstand harsh environments. Importers are typically advanced manufacturing industries requiring materials for demanding environments. Exporters are specialized chemical producers. The international trade reflects the niche but critical demand for these advanced materials in high-value applications where standard polymers fall short.

Covers
  • Polysulphide polymers
  • Polysulphone (PSU) granules
  • Polyethersulphone (PES) powder
  • Polyphenylsulphone (PPSU) pellets
  • Polyketones
  • Polyimides
  • Polybenzimidazoles
Examples
  • Solvay Udel PSU
  • BASF Ultrason PES
  • Arkema Kynar PVDF (high-performance polymer)
  • Toray PPSU

Codes often confused with 3911.90

Common mistake. This is a residual category, so confusion can arise with other specific high-performance polymers if their exact chemical structure is not identified, or with finished articles made from these polymers (e.g., membranes in Chapter 84).

Top exporters and importers of HS code 391190, 2025

In 2025, the largest exporter of HS code 391190 in UN Comtrade data was Germany, with 20% of world exports; the largest importer in UN Comtrade data was China, with 15% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Top exporters 2025 · share of world exports

  1. 1 Germany $1.0B
  2. 2 United States $872M
  3. 3 Japan $583M

World total: $5.2B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 China $769M
  2. 2 Germany $493M
  3. 3 United States $469M

World total: $5.2B Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM codes for 3911.90 13

Brazil splits HS 3911.90 into 13 NCM codes, Mercosur's 8-digit tariff lines.

  1. 3911.90.1 With fillerCom carga Group
  2. 3911.90.11 Filled modified polyterpenes, not with phenolsPoliterpenos modificados quimicamente, exceto com fenóis
  3. 3911.90.12 Filled polyetherimides (PEI) and copolymersPolieterimidas (PEI) e seus copolímeros
  4. 3911.90.13 Filled polyethersulphones (PES) and copolymersPolietersulfonas (PES) e seus copolímeros
  5. 3911.90.14 Filled poly(phenylene sulphide)Poli(sulfeto de fenileno)
  6. 3911.90.19 Other filled polysulphones and similar polymersOutros
  7. 3911.90.2 Without fillerSem carga Group
  8. 3911.90.21 Unfilled modified polyterpenes, not with phenolsPoliterpenos modificados quimicamente, exceto com fenóis
  9. 3911.90.22 Unfilled poly(phenylene sulphide)Poli(sulfeto de fenileno)
  10. 3911.90.23 Unfilled polyethyleneaminesPolietilenaminas
  11. 3911.90.24 Unfilled polyetherimides (PEI) and copolymersPolieterimidas (PEI) e seus copolímeros
  12. 3911.90.25 Unfilled polyethersulphones (PES) and copolymersPolietersulfonas (PES) e seus copolímeros
  13. 3911.90.26 Unfilled polysulphonesPolissulfonas
  14. 3911.90.27 Hexadimethrine chlorideCloreto de hexadimetrina
  15. 3911.90.29 Other unfilled polysulphones and similar polymersOutros

All Brazil NCM codes in heading 39.11 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 3911.90

What is HS code 391190?

HS code 391190 is a 6-digit subheading in the Harmonized System that covers: Polysulphides, polysulphones and similar products of chemical synthesis n.e.c. in chapter 39; in primary forms. This 'basket' code covers a variety of specialized synthetic polymers in primary forms not elsewhere specified in Chapter 39, specifically highlighting polysulphides and polysulphones. These high-performance polymers are known for their excellent chemical resistance, high-temperature stability, and mechanical strength. Polysulphides are often used in sealants, adhesives, and coatings, particularly in aerospace and construction, due to their flexibility and solvent resistance. Polysulphones find applications in membranes, medical devices, and electrical components due to their toughness, transparency, and ability to withstand harsh environments. Importers are typically advanced manufacturing industries requiring materials for demanding environments. Exporters are specialized chemical producers. The international trade reflects the niche but critical demand for these advanced materials in high-value applications where standard polymers fall short.

What products fall under HS code 391190?

Polysulphide polymers, Polysulphone (PSU) granules, Polyethersulphone (PES) powder, Polyphenylsulphone (PPSU) pellets, Polyketones, Polyimides, Polybenzimidazoles

What are common misclassifications for HS code 391190?

This is a residual category, so confusion can arise with other specific high-performance polymers if their exact chemical structure is not identified, or with finished articles made from these polymers (e.g., membranes in Chapter 84).

Which countries are the top exporters of goods under HS code 391190?

In 2025, the top exporters of HS code 391190 in UN Comtrade data were Germany ($1.0B, 20% of world exports), the United States ($872M) and Japan ($583M). World exports came to about $5.2B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of goods under HS code 391190?

In 2025, the top importers of HS code 391190 in UN Comtrade data were China ($769M, 15% of world imports), Germany ($493M) and the United States ($469M). World imports came to about $5.2B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

How is HS code 391190 structured?

HS code 391190 is a 6-digit subheading under the Harmonized System. The first 2 digits (39) identify the chapter, digits 3-4 (11) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 391190?

Brazil splits HS code 391190 into 13 NCM codes: 3911.90.11 (Filled modified polyterpenes, not with phenols), 3911.90.12 (Filled polyetherimides (PEI) and copolymers), 3911.90.13 (Filled polyethersulphones (PES) and copolymers), 3911.90.14 (Filled poly(phenylene sulphide)), 3911.90.19 (Other filled polysulphones and similar polymers), 3911.90.21 (Unfilled modified polyterpenes, not with phenols), 3911.90.22 (Unfilled poly(phenylene sulphide)), 3911.90.23 (Unfilled polyethyleneamines), and more listed on this page. The first 6 digits of each match the HS code.