HS code · 6-digit subheading
HS Code 2912.50 – Aldehydes; cyclic polymers of aldehydes
HS code 2912.50 is the 6-digit subheading for aldehydes, cyclic polymers of aldehydes. It is used for paraldehyde, metaldehyde, trioxane, tetraldehyde and cyclic acetaldehyde trimer.
What HS 2912.50 covers
This HS code specifically covers cyclic polymers of aldehydes, which are compounds formed by the polymerization of aldehyde monomers into a cyclic structure. The most common example is paraldehyde, a cyclic trimer of acetaldehyde. These polymers are traded for their unique properties, often serving as solvents, chemical intermediates, or even as sedatives in specific pharmaceutical applications. Importers typically include chemical manufacturers, pharmaceutical companies, and laboratories requiring stable, less volatile forms of aldehydes for various reactions or formulations. Exporters are generally chemical producers with the capability to synthesize and purify these specific polymeric forms. Key aspects of their trade involve ensuring the correct degree of polymerization, purity, and stability, as well as adherence to safety and regulatory standards, especially when used in pharmaceutical contexts. Demand is often niche but critical for specific industrial and medical applications.
- Covers
- Paraldehyde
- Metaldehyde
- Trioxane
- Tetraldehyde
- Cyclic acetaldehyde trimer
- Cyclic formaldehyde trimer
- Examples
- Sigma-Aldrich Paraldehyde
- Merck KGaA Metaldehyde
- TCI Chemicals Trioxane
- BASF Paraldehyde
Codes often confused with 2912.50
Common mistake. This code can be confused with the monomeric aldehydes themselves (e.g., acetaldehyde under 291219) if the polymeric nature is not clearly identified. It might also be mistaken for other non-cyclic aldehyde polymers (Chapter 39) if the cyclic structure is not emphasized.
Top exporters and importers of HS code 291250, 2025
In 2025, the largest exporter of HS code 291250 in UN Comtrade data was Switzerland, with 43% of world exports; the largest importer in UN Comtrade data was France, with 17% 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 Switzerland $19M 43% of world exports
- 2 China $13M 30% of world exports
- 3 Germany $5.8M 13% of world exports
World total: $45M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 France $9.1M 17% of world imports
- 2 Vietnam* ~$8.9M 17% of world imports · partner records ↗
- 3 Sweden $7.1M 13% of world imports
World total: $53M 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 2912.50
Brazil does not split HS 2912.50: its NCM code is 2912.50.00.
All Brazil NCM codes in heading 29.12 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2912.50
What is HS code 291250?
HS code 291250 is a 6-digit subheading in the Harmonized System that covers: Aldehydes; cyclic polymers of aldehydes. This HS code specifically covers cyclic polymers of aldehydes, which are compounds formed by the polymerization of aldehyde monomers into a cyclic structure. The most common example is paraldehyde, a cyclic trimer of acetaldehyde. These polymers are traded for their unique properties, often serving as solvents, chemical intermediates, or even as sedatives in specific pharmaceutical applications. Importers typically include chemical manufacturers, pharmaceutical companies, and laboratories requiring stable, less volatile forms of aldehydes for various reactions or formulations. Exporters are generally chemical producers with the capability to synthesize and purify these specific polymeric forms. Key aspects of their trade involve ensuring the correct degree of polymerization, purity, and stability, as well as adherence to safety and regulatory standards, especially when used in pharmaceutical contexts. Demand is often niche but critical for specific industrial and medical applications.
What products fall under HS code 291250?
Paraldehyde, Metaldehyde, Trioxane, Tetraldehyde, Cyclic acetaldehyde trimer, Cyclic formaldehyde trimer
What are common misclassifications for HS code 291250?
This code can be confused with the monomeric aldehydes themselves (e.g., acetaldehyde under 291219) if the polymeric nature is not clearly identified. It might also be mistaken for other non-cyclic aldehyde polymers (Chapter 39) if the cyclic structure is not emphasized.
Which countries are the top exporters of goods under HS code 291250?
In 2025, the top exporters of HS code 291250 in UN Comtrade data were Switzerland ($19M, 43% of world exports), China ($13M) and Germany ($5.8M). World exports came to about $45M, 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 291250?
In 2025, the top importers of HS code 291250 in UN Comtrade data were France ($9.1M, 17% of world imports), Vietnam (about $8.9M) and Sweden ($7.1M). World imports came to about $53M, 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 291250 structured?
HS code 291250 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (12) identify the heading, and digits 5-6 (50) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 291250?
In Brazil, HS code 291250 is NCM 2912.50.00. The last two digits are 00 because Brazil does not split this HS code further.