HS code · 6-digit subheading
HS Code 2901.29 – Acyclic hydrocarbons; unsaturated, n.e.c. in heading no. 2901
HS code 2901.29 is the 6-digit subheading for acyclic hydrocarbons, unsaturated, n.e.c. in heading no. 2901. It is used for pentene, hexene, octene, decene and acetylene.
What HS 2901.29 covers
This "not elsewhere specified" category captures a diverse range of unsaturated acyclic hydrocarbons that don't fall under the specific ethylene, propene, butene, or butadiene/isoprene codes. It includes higher olefins, acetylenes, and other complex unsaturated structures. These compounds serve various niche but important roles as specialty monomers, chemical intermediates, and solvents in industries ranging from pharmaceuticals to fine chemicals and advanced materials. International trade involves specialized chemical companies and distributors, often dealing in smaller volumes compared to the major olefins. Exporters typically include countries with sophisticated chemical industries, such as Germany, the United States, and Japan, while importers are often other industrial nations seeking specific chemical building blocks. Transport and handling requirements vary widely depending on the specific compound's properties. Market dynamics are driven by specific application demands rather than broad commodity trends.
- Covers
- Pentene
- Hexene
- Octene
- Decene
- Acetylene
- Propyne
- Butyne
- Dodecene
- Examples
- Alpha-olefins (e.g., 1-Hexene, 1-Octene from Chevron Phillips)
- Acetylene gas (industrial grade)
- Specialty alkynes
- BASF (producer of various higher olefins)
Codes often confused with 2901.29
Common mistake. This is the "catch-all" for unsaturated acyclic hydrocarbons, so misclassification often occurs when a specific compound should have been classified under 290121, 290122, 290123, or 290124. Careful chemical identification is crucial to avoid incorrect classification into this residual code.
Top exporters and importers of HS code 290129, 2025
In 2025, the largest exporter of HS code 290129 in UN Comtrade data was the United States, with 40% of world exports; the largest importer in UN Comtrade data was the United States, with 10% 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 United States $1.1B 40% of world exports
- 2 South Africa $429M 16% of world exports
- 3 Qatar* ~$284M 11% of world exports · partner records ↗
World total: $2.7B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $293M 10% of world imports
- 2 India $286M 10% of world imports
- 3 China $244M 8.6% of world imports
World total: $2.8B 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 2901.29
Brazil does not split HS 2901.29: its NCM code is 2901.29.00.
All Brazil NCM codes in heading 29.01 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2901.29
What is HS code 290129?
HS code 290129 is a 6-digit subheading in the Harmonized System that covers: Acyclic hydrocarbons; unsaturated, n.e.c. in heading no. 2901. This "not elsewhere specified" category captures a diverse range of unsaturated acyclic hydrocarbons that don't fall under the specific ethylene, propene, butene, or butadiene/isoprene codes. It includes higher olefins, acetylenes, and other complex unsaturated structures. These compounds serve various niche but important roles as specialty monomers, chemical intermediates, and solvents in industries ranging from pharmaceuticals to fine chemicals and advanced materials. International trade involves specialized chemical companies and distributors, often dealing in smaller volumes compared to the major olefins. Exporters typically include countries with sophisticated chemical industries, such as Germany, the United States, and Japan, while importers are often other industrial nations seeking specific chemical building blocks. Transport and handling requirements vary widely depending on the specific compound's properties. Market dynamics are driven by specific application demands rather than broad commodity trends.
What products fall under HS code 290129?
Pentene, Hexene, Octene, Decene, Acetylene, Propyne, Butyne, Dodecene
What are common misclassifications for HS code 290129?
This is the "catch-all" for unsaturated acyclic hydrocarbons, so misclassification often occurs when a specific compound should have been classified under 290121, 290122, 290123, or 290124. Careful chemical identification is crucial to avoid incorrect classification into this residual code.
Which countries are the top exporters of goods under HS code 290129?
In 2025, the top exporters of HS code 290129 in UN Comtrade data were the United States ($1.1B, 40% of world exports), South Africa ($429M) and Qatar (about $284M). World exports came to about $2.7B, 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 290129?
In 2025, the top importers of HS code 290129 in UN Comtrade data were the United States ($293M, 10% of world imports), India ($286M) and China ($244M). World imports came to about $2.8B, 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 290129 structured?
HS code 290129 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (01) identify the heading, and digits 5-6 (29) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 290129?
In Brazil, HS code 290129 is NCM 2901.29.00. The last two digits are 00 because Brazil does not split this HS code further.