Product classification
HS code for Synthetic wool blend yarn: 5509.91
Yarn, (not sewing thread), of synthetic staple fibres, mixed mainly or solely with wool or fine animal hair, n.e.c. in heading no. 5509, not put up for retail sale.
Classification of synthetic wool blend yarn under HS 5509.91
Synthetic wool blend yarn is classified under HS code 5509.91. This code applies to yarn (other than sewing thread) made of synthetic staple fibers that are mixed mainly or solely with wool or fine animal hair. To fall under heading 55.09, the synthetic staple fiber must constitute the largest percentage by weight of the blend. If wool were the predominant fiber by weight, the yarn would be classified in Chapter 51. Furthermore, 5509.91 specifically applies to yarn that is "not put up for retail sale." This means the yarn is typically imported in large industrial cones or hanks intended for further manufacturing rather than in small balls or skeins for individual consumers. The classification is determined by Section XI, Note 2, which dictates the rules for textile blends based on weight predominance.
- Covers
- Acrylic and wool blend yarn for industrial knitting
- Polyester and fine animal hair blend yarn
- Synthetic staple fiber yarn mixed with 30% wool
- Nylon and wool blend yarn on industrial cones
- Blended yarns of synthetic fibers and mohair
- Also under 5509.91
- Südwolle Group (specializes in wool blends)
- Novita Yarns (some blends)
- Schoeller Spinning Group (wool blends)
- Indorama Ventures (polyester often blended)
- Reliance Industries (polyester often blended)
Codes often confused with 5509.91
Common mistake. This code is often confused with 5511.10 or 5511.20, which cover synthetic yarns "put up for retail sale." If the yarn is packaged for consumer use (e.g., with labels and specific weights), it must move to 55.11. It is also confused with 5509.52, which is specifically for polyester staple fibers mixed with wool. 5509.91 is a residual category for other synthetic staple fibers mixed with wool.
Top exporters and importers of HS 550991 (the code used for synthetic wool blend yarn), 2025
In 2025, the largest exporter of HS 550991 (the code used for synthetic wool blend yarn) in UN Comtrade data was China, with 61% of world exports; the largest importer in UN Comtrade data was Bangladesh, with about 17% 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 550991, not only synthetic wool blend yarn.
Top exporters 2025 · share of world exports
- 1 China $20M 61% of world exports
- 2 Italy $5.6M 17% of world exports
- 3 Hong Kong $2.0M 6.1% of world exports
World total: $33M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Bangladesh* ~$5.5M 17% of world imports · partner records ↗
- 2 Russia* ~$3.8M 12% of world imports · partner records ↗
- 3 China $3.1M 9.6% of world imports
World total: $32M 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 synthetic wool blend yarn
Brazil classifies synthetic wool blend yarn under NCM 5509.91.00: HS 5509.91 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about synthetic wool blend yarn
What is the HS code for Synthetic wool blend yarn?
The HS code for Synthetic wool blend yarn is 550991 (Yarn; (not sewing thread), of synthetic staple fibres, mixed mainly or solely with wool or fine animal hair, n.e.c. in heading no. 5509, not put up for retail sale). The HS code for yarn of synthetic staple fibers mixed mainly with wool, not for retail sale, is 5509.91.
How do I classify Synthetic wool blend yarn for customs?
Synthetic wool blend yarn is classified under HS code 550991 — Yarn; (not sewing thread), of synthetic staple fibres, mixed mainly or solely with wool or fine animal hair, n.e.c. in heading no. 5509, not put up for retail sale. This is a 6-digit subheading level code.
What happens if the wool content is higher than the synthetic content?
If the wool content exceeds the synthetic content by weight, the yarn is classified under heading 51.09 instead of 55.09.
Which countries are the top exporters of synthetic wool blend yarn (HS 550991)?
In 2025, the top exporters of HS 550991 (the code used for synthetic wool blend yarn) in UN Comtrade data were China ($20M, 61% of world exports), Italy ($5.6M) and Hong Kong ($2.0M). World exports came to about $33M, 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 synthetic wool blend yarn (HS 550991)?
In 2025, the top importers of HS 550991 (the code used for synthetic wool blend yarn) in UN Comtrade data were Bangladesh (about $5.5M, 17% of world imports), Russia (about $3.8M) and China ($3.1M). World imports came to about $32M, 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 Synthetic wool blend yarn the same in all countries?
The base HS code 550991 for Synthetic wool blend yarn 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 synthetic wool blend yarn in Brazil?
In Brazil, synthetic wool blend yarn (HS 550991) is classified under NCM 5509.91.00.