HS code · 6-digit subheading

HS Code 5403.10 – Yarn, artificial; filament, monofilament (less than 67 decitex), of high tenacity viscose rayon, not for retail sale, not sewing thread

HS code 5403.10 is the 6-digit subheading for yarn, artificial, filament, monofilament (less than 67 decitex), of high tenacity viscose rayon, not for retail sale, not sewing thread. It is used for viscose rayon tire cord yarn, high-strength rayon yarn, industrial viscose filament, rayon for technical textiles and viscose for reinforcement materials.

What HS 5403.10 covers

This category encompasses high tenacity viscose rayon filament yarn, not for retail sale or as sewing thread. The 'high tenacity' characteristic is critical, indicating superior strength and durability compared to standard viscose rayon. This makes it an essential material for demanding industrial applications where robust performance is required. Key uses include tire cords, conveyor belts, hoses, and other technical textiles that require high tensile strength and dimensional stability. Importers are typically manufacturers of these specialized industrial products, while exporters are chemical fiber producers with advanced manufacturing capabilities. Understanding the specific strength ratings and denier is crucial for trade, as these yarns are engineered for precise performance requirements in critical applications.

Covers
  • Viscose rayon tire cord yarn
  • High-strength rayon yarn
  • Industrial viscose filament
  • Rayon for technical textiles
  • Viscose for reinforcement materials
  • High-tenacity textile yarn
Examples
  • Lenzing Viscose (specialty grades)
  • Birla Cellulose (high-tenacity variants)
  • Sateri (industrial grades)
  • Kelheim Fibres (specialty viscose)
  • Teijin Aramid (comparison for high-tenacity industrial use)

Codes often confused with 5403.10

Common mistake. Often confused with 540331 (non-high tenacity viscose rayon yarn) due to the shared material, but the 'high tenacity' characteristic is crucial for correct classification.

5403.31Yarn, artificial; filament, monofilament (less than 67 decitex), of viscose rayon (not high tenacity), single, untwisted or twisted 120 turns per metre or less, not for retail sale, not sewing thread

Top exporters and importers of HS code 540310, 2025

In 2025, the largest exporter of HS code 540310 in UN Comtrade data was India, with 38% of world exports; the largest importer in UN Comtrade data was Egypt, with 34% 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 India $20M
  2. 2 Poland $8.7M
  3. 3 Vietnam* ~$7.6M

World total: $51M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Egypt $47M
  2. 2 Luxembourg $12M
  3. 3 Japan $10M

World total: $137M 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 code for 5403.10

Brazil does not split HS 5403.10: its NCM code is 5403.10.00.

  1. 5403.10.00 High-tenacity viscose rayon filament yarnFios de alta tenacidade, de raiom viscose

All Brazil NCM codes in heading 54.03 →

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

Questions about HS 5403.10

What is HS code 540310?

HS code 540310 is a 6-digit subheading in the Harmonized System that covers: Yarn, artificial; filament, monofilament (less than 67 decitex), of high tenacity viscose rayon, not for retail sale, not sewing thread. This category encompasses high tenacity viscose rayon filament yarn, not for retail sale or as sewing thread. The 'high tenacity' characteristic is critical, indicating superior strength and durability compared to standard viscose rayon. This makes it an essential material for demanding industrial applications where robust performance is required. Key uses include tire cords, conveyor belts, hoses, and other technical textiles that require high tensile strength and dimensional stability. Importers are typically manufacturers of these specialized industrial products, while exporters are chemical fiber producers with advanced manufacturing capabilities. Understanding the specific strength ratings and denier is crucial for trade, as these yarns are engineered for precise performance requirements in critical applications.

What products fall under HS code 540310?

Viscose rayon tire cord yarn, High-strength rayon yarn, Industrial viscose filament, Rayon for technical textiles, Viscose for reinforcement materials, High-tenacity textile yarn

What are common misclassifications for HS code 540310?

Often confused with 540331 (non-high tenacity viscose rayon yarn) due to the shared material, but the 'high tenacity' characteristic is crucial for correct classification.

Which countries are the top exporters of goods under HS code 540310?

In 2025, the top exporters of HS code 540310 in UN Comtrade data were India ($20M, 38% of world exports), Poland ($8.7M) and Vietnam (about $7.6M). World exports came to about $51M, 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 540310?

In 2025, the top importers of HS code 540310 in UN Comtrade data were Egypt ($47M, 34% of world imports), Luxembourg ($12M) and Japan ($10M). World imports came to about $137M, 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 540310 structured?

HS code 540310 is a 6-digit subheading under the Harmonized System. The first 2 digits (54) identify the chapter, digits 3-4 (03) identify the heading, and digits 5-6 (10) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 540310?

In Brazil, HS code 540310 is NCM 5403.10.00. The last two digits are 00 because Brazil does not split this HS code further.