HS code · 6-digit subheading

HS Code 5509.51 – Yarn; (not sewing thread), of polyester staple fibres, mixed mainly or solely with artificial staple fibres, not put up for retail sale

HS code 5509.51 is the 6-digit subheading for yarn, (not sewing thread), of polyester staple fibres, mixed mainly or solely with artificial staple fibres, not put up for retail sale. It is used for polyester-rayon blend yarn, polyester-modal blend yarn, polyester-lyocell blend yarn, polyester-viscose blend yarn and polyester-cupro blend yarn.

What HS 5509.51 covers

This category includes yarns, excluding sewing thread, made from polyester staple fibres blended predominantly or entirely with artificial staple fibres, and not prepared for retail sale. These blended yarns are highly valued in the textile industry for combining the desirable properties of both fiber types – polyester for strength, durability, and wrinkle resistance, and artificial fibers (like rayon or modal) for softness, drape, and moisture absorption. They are widely used by fabric manufacturers for apparel, home textiles, and technical applications where a balance of performance and comfort is desired. Importers are typically textile mills seeking specific aesthetic and performance characteristics for their end products, while exporters are specialized yarn spinners. The trade in these yarns reflects the demand for versatile and comfortable fabrics in the global market.

Covers: Polyester-rayon blend yarn
Polyester-modal blend yarn
Polyester-lyocell blend yarn
Polyester-viscose blend yarn
Polyester-cupro blend yarn
Blended spun yarn (polyester/artificial)
Poly-rayon core-spun yarn
Polyester-acetate blend yarn
Examples: Birla Cellulose (viscose/modal often blended)
Lenzing AG (Tencel/Modal often blended)
Indorama Ventures (polyester often blended)
Reliance Industries (polyester often blended)
Huvis (polyester often blended)

Codes often confused with 5509.51

Common mistake. This code is often confused with 550941 or 550942 if the specific blend with 'artificial staple fibres' is overlooked, or with 550999 if the polyester/artificial blend is not the primary component.

5509.41Yarn; (not sewing thread), single, containing 85% or more by weight of synthetic staple fibres, n.e.c. in heading no. 5509, not put up for retail sale 5509.42Yarn; (not sewing thread), multiple (folded) or cabled yarn, containing 85% or more by weight of synthetic staple fibres, n.e.c. in heading no. 5509, not put up for retail sale 5509.99Yarn; (not sewing thread), of synthetic staple fibres, mixed mainly or solely with fibres (other than wool, fine animal hair or cotton), n.e.c. in heading no. 5509, not put up for retail sale

Top exporters and importers of HS code 550951, 2025

In 2025, the largest exporter of HS code 550951 in UN Comtrade data was China, with 43% of world exports; the largest importer in UN Comtrade data was Türkiye, with 22% 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 China $157M 43% of world exports
2 India $83M 23% of world exports
3 Indonesia $45M 12% of world exports

World total: $364M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

1 Türkiye $81M 22% of world imports
2 Brazil $68M 19% of world imports
3 India $62M 17% of world imports

World total: $366M 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 code for 5509.51

Brazil does not split HS 5509.51: its NCM code is 5509.51.00.

5509.51.00 Polyester staple yarn mixed with artificial fibresCombinadas, principal ou unicamente, com fibras artificiais descontínuas

All Brazil NCM codes in heading 55.09 →

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

Access via API

GET /api/hs-code/550951/

{
  "code": "550951",
  "description": "Yarn; (not sewing thread), of polyester staple fibres, mixed mainly or solely with artificial staple fibres, not put up for retail sale",
  "section": "XI",
  "parent": "5509"
}

API docs →

Questions about HS 5509.51

What is HS code 550951?

HS code 550951 is a 6-digit subheading in the Harmonized System that covers: Yarn; (not sewing thread), of polyester staple fibres, mixed mainly or solely with artificial staple fibres, not put up for retail sale. This category includes yarns, excluding sewing thread, made from polyester staple fibres blended predominantly or entirely with artificial staple fibres, and not prepared for retail sale. These blended yarns are highly valued in the textile industry for combining the desirable properties of both fiber types – polyester for strength, durability, and wrinkle resistance, and artificial fibers (like rayon or modal) for softness, drape, and moisture absorption. They are widely used by fabric manufacturers for apparel, home textiles, and technical applications where a balance of performance and comfort is desired. Importers are typically textile mills seeking specific aesthetic and performance characteristics for their end products, while exporters are specialized yarn spinners. The trade in these yarns reflects the demand for versatile and comfortable fabrics in the global market.

What products fall under HS code 550951?

Polyester-rayon blend yarn, Polyester-modal blend yarn, Polyester-lyocell blend yarn, Polyester-viscose blend yarn, Polyester-cupro blend yarn, Blended spun yarn (polyester/artificial), Poly-rayon core-spun yarn, Polyester-acetate blend yarn

What are common misclassifications for HS code 550951?

This code is often confused with 550941 or 550942 if the specific blend with 'artificial staple fibres' is overlooked, or with 550999 if the polyester/artificial blend is not the primary component.

Which countries are the top exporters of goods under HS code 550951?

In 2025, the top exporters of HS code 550951 in UN Comtrade data were China ($157M, 43% of world exports), India ($83M) and Indonesia ($45M). World exports came to about $364M, 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 550951?

In 2025, the top importers of HS code 550951 in UN Comtrade data were Türkiye ($81M, 22% of world imports), Brazil ($68M) and India ($62M). World imports came to about $366M, 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 550951 structured?

HS code 550951 is a 6-digit subheading under the Harmonized System. The first 2 digits (55) identify the chapter, digits 3-4 (09) identify the heading, and digits 5-6 (51) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 550951?

In Brazil, HS code 550951 is NCM 5509.51.00. The last two digits are 00 because Brazil does not split this HS code further.