HS code · 6-digit subheading
HS Code 5509.31 – Yarn; (not sewing thread), single, of synthetic staple fibres, containing 85% or more by weight of acrylic or modacrylic, not put up for retail sale
HS code 5509.31 is the 6-digit subheading for yarn, (not sewing thread), single, of synthetic staple fibres, containing 85% or more by weight of acrylic or modacrylic, not put up for retail sale. It is used for single acrylic staple fiber yarn, high-bulk acrylic single yarn, modacrylic single yarn, acrylic knitwear yarn (single) and acrylic blanket yarn (single).
What HS 5509.31 covers
This HS code covers single yarns made from synthetic staple fibers, specifically those with a high concentration (85% or more by weight) of acrylic or modacrylic, and not prepared for retail sale. These yarns are highly valued in the textile industry for their wool-like feel, warmth, and resistance to sunlight and chemicals. They are extensively used in the production of knitwear, blankets, carpets, and outdoor fabrics. Major importers are typically countries with strong apparel and home textile manufacturing sectors, such as China, India, Turkey, and Vietnam, which process these yarns into finished goods. Exporters often include nations with significant chemical and fiber production capabilities, like China, Taiwan, and Japan. For traders, understanding the specific type of acrylic (e.g., regular, high-bulk), denier, and staple length is crucial, as these characteristics determine the yarn's suitability for different applications and its market value.
- Covers
- Single acrylic staple fiber yarn
- High-bulk acrylic single yarn
- Modacrylic single yarn
- Acrylic knitwear yarn (single)
- Acrylic blanket yarn (single)
- Acrylic carpet yarn (single, not retail)
- Flame-retardant modacrylic yarn
- Examples
- Dralon (acrylic staple fiber yarns)
- Kanecaron (modacrylic yarns)
- Torayca (acrylic yarns)
Codes often confused with 5509.31
Common mistake. This code is distinct from 550932 (multiple/cabled acrylic yarn) due to its single strand nature. It could also be confused with other synthetic staple fiber yarns (e.g., polyester in 550921) if the acrylic/modacrylic content is not accurately declared.
Top exporters and importers of HS code 550931, 2025
In 2025, the largest exporter of HS code 550931 in UN Comtrade data was Türkiye, with 27% of world exports; the largest importer in UN Comtrade data was Italy, with 13% 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 Türkiye $26M 27% of world exports
- 2 Romania $10M 10% of world exports
- 3 China $10M 10% of world exports
World total: $98M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Italy $10M 13% of world imports
- 2 Bangladesh* ~$5.2M 6.4% of world imports · partner records ↗
- 3 South Korea $4.0M 4.9% of world imports
World total: $81M 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 5509.31
Brazil does not split HS 5509.31: its NCM code is 5509.31.00.
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.
Questions about HS 5509.31
What is HS code 550931?
HS code 550931 is a 6-digit subheading in the Harmonized System that covers: Yarn; (not sewing thread), single, of synthetic staple fibres, containing 85% or more by weight of acrylic or modacrylic, not put up for retail sale. This HS code covers single yarns made from synthetic staple fibers, specifically those with a high concentration (85% or more by weight) of acrylic or modacrylic, and not prepared for retail sale. These yarns are highly valued in the textile industry for their wool-like feel, warmth, and resistance to sunlight and chemicals. They are extensively used in the production of knitwear, blankets, carpets, and outdoor fabrics. Major importers are typically countries with strong apparel and home textile manufacturing sectors, such as China, India, Turkey, and Vietnam, which process these yarns into finished goods. Exporters often include nations with significant chemical and fiber production capabilities, like China, Taiwan, and Japan. For traders, understanding the specific type of acrylic (e.g., regular, high-bulk), denier, and staple length is crucial, as these characteristics determine the yarn's suitability for different applications and its market value.
What products fall under HS code 550931?
Single acrylic staple fiber yarn, High-bulk acrylic single yarn, Modacrylic single yarn, Acrylic knitwear yarn (single), Acrylic blanket yarn (single), Acrylic carpet yarn (single, not retail), Flame-retardant modacrylic yarn
What are common misclassifications for HS code 550931?
This code is distinct from 550932 (multiple/cabled acrylic yarn) due to its single strand nature. It could also be confused with other synthetic staple fiber yarns (e.g., polyester in 550921) if the acrylic/modacrylic content is not accurately declared.
Which countries are the top exporters of goods under HS code 550931?
In 2025, the top exporters of HS code 550931 in UN Comtrade data were Türkiye ($26M, 27% of world exports), Romania ($10M) and China ($10M). World exports came to about $98M, 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 550931?
In 2025, the top importers of HS code 550931 in UN Comtrade data were Italy ($10M, 13% of world imports), Bangladesh (about $5.2M) and South Korea ($4.0M). World imports came to about $81M, 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 550931 structured?
HS code 550931 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 (31) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 550931?
In Brazil, HS code 550931 is NCM 5509.31.00. The last two digits are 00 because Brazil does not split this HS code further.