Product classification

HS code for Viscose rayon yarn (high tenacity): 5403.10

Yarn, artificial, filament, monofilament (less than 67 decitex), of high tenacity viscose rayon, not for retail sale, not sewing thread.

Classification of viscose rayon yarn (high tenacity) under HS 5403.10

High tenacity viscose rayon yarn is classified under HS code 5403.10. In the context of the Harmonized System, "high tenacity" refers to yarn that meets specific breaking strength requirements defined in the Section XI notes. For viscose rayon, this typically means a tenacity greater than 27 cN/tex. Heading 5403 covers artificial filament yarns, and the first subheading (5403.10) is reserved for high tenacity varieties. These yarns are engineered for high strength and are often used in industrial applications, such as the reinforcement of rubber tires, hoses, or conveyor belts. The classification depends entirely on the physical performance characteristics of the filament. If the yarn does not meet the tenacity threshold, it must be classified under the subheadings for regular tenacity yarn (e.g., 5403.31 or 5403.41). This code applies only to yarn not put up for retail sale and not configured as sewing thread.

Covers
  • High tenacity viscose filament yarn
  • Industrial grade viscose rayon yarn
  • Tire cord yarn of viscose rayon (not yet fabric)
  • High-strength regenerated cellulose filament
  • Viscose yarn exceeding 27 cN/tex tenacity
Also under 5403.10
  • 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. It is often confused with HS code 5403.31 (regular single yarn) if the tenacity is not tested or specified. It may also be misclassified under HS code 5902.20 if it has already been woven into a tire cord fabric. Additionally, synthetic high tenacity yarns (like nylon or polyester) are classified under 5402.11 or 5402.19, so the chemical origin of the fiber must be confirmed as artificial (viscose).

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 thread5902.20Textile fabrics; tyrecord of high tenacity yarn of polyester5402.11Yarn, synthetic; filament, monofilament (less than 67 decitex), of high tenacity yarn of nylon or other polyamides, textured or not; of aramids, not for retail sale, not sewing thread5402.19Yarn, synthetic; filament, monofilament (less than 67 decitex), of high tenacity nylon or other polyamides, textured or not; other than aramids, not for retail sale, not sewing thread

Top exporters and importers of HS 540310 (the code used for viscose rayon yarn (high tenacity)), 2025

In 2025, the largest exporter of HS 540310 (the code used for viscose rayon yarn (high tenacity)) 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.

Figures cover everything classified under HS 540310, not only viscose rayon yarn (high tenacity).

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 viscose rayon yarn (high tenacity)

Brazil classifies viscose rayon yarn (high tenacity) under NCM 5403.10.00: HS 5403.10 with 00 added.

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about viscose rayon yarn (high tenacity)

What is the HS code for Viscose rayon yarn (high tenacity)?

The HS code for Viscose rayon yarn (high tenacity) is 540310 (Yarn, artificial; filament, monofilament (less than 67 decitex), of high tenacity viscose rayon, not for retail sale, not sewing thread). The HS code for high tenacity viscose rayon filament yarn is 5403.10.

How do I classify Viscose rayon yarn (high tenacity) for customs?

Viscose rayon yarn (high tenacity) is classified under HS code 540310 — Yarn, artificial; filament, monofilament (less than 67 decitex), of high tenacity viscose rayon, not for retail sale, not sewing thread. This is a 6-digit subheading level code.

What defines "high tenacity" for viscose in the HS code?

According to Section XI Note 6, high tenacity viscose rayon must have a tenacity greater than 27 cN/tex.

Which countries are the top exporters of viscose rayon yarn (high tenacity) (HS 540310)?

In 2025, the top exporters of HS 540310 (the code used for viscose rayon yarn (high tenacity)) 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 viscose rayon yarn (high tenacity) (HS 540310)?

In 2025, the top importers of HS 540310 (the code used for viscose rayon yarn (high tenacity)) 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.

Is the HS code for Viscose rayon yarn (high tenacity) the same in all countries?

The base HS code 540310 for Viscose rayon yarn (high tenacity) is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.

What is the NCM code for viscose rayon yarn (high tenacity) in Brazil?

In Brazil, viscose rayon yarn (high tenacity) (HS 540310) is classified under NCM 5403.10.00.