HS code · 6-digit subheading
HS Code 2911.00 – Acetals and hemiacetals; whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives
HS code 2911.00 is the 6-digit subheading for acetals and hemiacetals, whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives. It is used for dimethoxymethane, 1,1-diethoxyethane, benzaldehyde dimethyl acetal, glycerol formal and polyvinyl butyral.
What HS 2911.00 covers
This HS code covers acetals and hemiacetals, a class of organic compounds characterized by specific ether linkages. These chemicals are versatile, serving as protective groups in complex organic synthesis, components in fragrances and flavors, and intermediates for polymers and resins. For instance, polyvinyl butyral (PVB) is a well-known acetal polymer used in laminated safety glass. Importers and exporters range from fine chemical suppliers and pharmaceutical companies to manufacturers in the automotive and construction sectors. Their stability, specific reactivity, and ability to mask reactive aldehyde/ketone groups make them valuable in various niche and high-tech applications, driving a steady, specialized international trade.
- Covers
- Dimethoxymethane
- 1,1-diethoxyethane
- Benzaldehyde dimethyl acetal
- Glycerol formal
- Polyvinyl butyral
- Paraldehyde
- Examples
- Sigma-Aldrich Dimethoxymethane
- BASF Glycerol Formal
- Kuraray PVB (Polyvinyl Butyral)
Codes often confused with 2911.00
Common mistake. Can be confused with ethers (2909) or even aldehydes (2912) from which they are derived, but the presence of two ether linkages to the same carbon atom is the distinguishing feature.
Top exporters and importers of HS code 291100, 2025
In 2025, the largest exporter of HS code 291100 in UN Comtrade data was India, with 17% of world exports; the largest importer in UN Comtrade data was the United States, with 14% 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 India $15M 17% of world exports
- 2 Belgium $14M 16% of world exports
- 3 China $13M 14% of world exports
World total: $89M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $13M 14% of world imports
- 2 China $9.6M 11% of world imports
- 3 Spain $7.2M 8.1% of world imports
World total: $89M 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 codes for 2911.00 2
Brazil splits HS 2911.00 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 2911.00.10 2-Nitrobenzaldehyde dimethyl acetalDimetilacetal do 2-nitrobenzaldeído
- 2911.00.90 Other acetals and hemiacetalsOutros
All Brazil NCM codes in heading 29.11 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2911.00
What is HS code 291100?
HS code 291100 is a 6-digit subheading in the Harmonized System that covers: Acetals and hemiacetals; whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives. This HS code covers acetals and hemiacetals, a class of organic compounds characterized by specific ether linkages. These chemicals are versatile, serving as protective groups in complex organic synthesis, components in fragrances and flavors, and intermediates for polymers and resins. For instance, polyvinyl butyral (PVB) is a well-known acetal polymer used in laminated safety glass. Importers and exporters range from fine chemical suppliers and pharmaceutical companies to manufacturers in the automotive and construction sectors. Their stability, specific reactivity, and ability to mask reactive aldehyde/ketone groups make them valuable in various niche and high-tech applications, driving a steady, specialized international trade.
What products fall under HS code 291100?
Dimethoxymethane, 1,1-diethoxyethane, benzaldehyde dimethyl acetal, glycerol formal, polyvinyl butyral, paraldehyde
What are common misclassifications for HS code 291100?
Can be confused with ethers (2909) or even aldehydes (2912) from which they are derived, but the presence of two ether linkages to the same carbon atom is the distinguishing feature.
Which countries are the top exporters of goods under HS code 291100?
In 2025, the top exporters of HS code 291100 in UN Comtrade data were India ($15M, 17% of world exports), Belgium ($14M) and China ($13M). World exports came to about $89M, 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 291100?
In 2025, the top importers of HS code 291100 in UN Comtrade data were the United States ($13M, 14% of world imports), China ($9.6M) and Spain ($7.2M). World imports came to about $89M, 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 291100 structured?
HS code 291100 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (11) identify the heading, and digits 5-6 (00) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 291100?
Brazil splits HS code 291100 into 2 NCM codes: 2911.00.10 (2-Nitrobenzaldehyde dimethyl acetal), 2911.00.90 (Other acetals and hemiacetals). The first 6 digits of each match the HS code.