HS code · 6-digit subheading
HS Code 3811.19 – Anti-knock preparations; other than those based on lead compounds
HS code 3811.19 is the 6-digit subheading for anti-knock preparations, other than those based on lead compounds. It is used for methyl tertiary-butyl ether (MTBE), ethanol (as fuel additive), methylcyclopentadienyl manganese tricarbonyl (MMT), ferrocene and tertiary-butyl alcohol (TBA).
What HS 3811.19 covers
This category encompasses all anti-knock preparations for internal combustion engines that do not contain lead compounds. These additives are crucial for modern fuels, improving octane ratings and preventing engine knocking, which can lead to engine damage and reduced fuel efficiency. Common non-lead anti-knock agents include oxygenates like MTBE and ethanol, as well as metallic compounds such as MMT. Key players in this trade are petroleum refiners, fuel additive manufacturers, and chemical companies, driven by the global demand for cleaner fuels and higher engine performance. The market is influenced by evolving fuel standards, advancements in engine technology, and stringent environmental regulations pushing for reduced emissions and improved combustion efficiency.
- Covers
- Methyl tertiary-butyl ether (MTBE)
- Ethanol (as fuel additive)
- Methylcyclopentadienyl manganese tricarbonyl (MMT)
- Ferrocene
- Tertiary-butyl alcohol (TBA)
- Isooctane
- Toluene (as octane booster)
- Examples
- Afton Chemical HiTEC
- Lubrizol Anglamol
- Innospec Octane Solutions
- BASF Keropur
- Chevron Oronite
Codes often confused with 3811.19
Common mistake. This code is clearly distinguished from 381111, which specifically covers lead-based anti-knock preparations, reflecting the global transition to unleaded fuels.
Top exporters and importers of HS code 381119, 2025
In 2025, the largest exporter of HS code 381119 in UN Comtrade data was India, with 28% of world exports; the largest importer in UN Comtrade data was Belgium, with 17% of world imports. Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 81% of its exports here ($10M, CEPII BACI), so it may also belong among the top exporters.
Top exporters 2025 · share of world exports
- 1 India $25M 28% of world exports
- 2 United States $21M 23% of world exports
- 3 Spain $9.0M 9.9% of world exports
Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 81% of its exports here ($10M, CEPII BACI), so it may also belong among the top exporters.
World total: $91M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Belgium $25M 17% of world imports
- 2 Saudi Arabia $14M 9.3% of world imports
- 3 Germany $10M 6.9% of world imports
World total: $149M 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 code for 3811.19
Brazil does not split HS 3811.19: its NCM code is 3811.19.00.
All Brazil NCM codes in heading 38.11 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 3811.19
What is HS code 381119?
HS code 381119 is a 6-digit subheading in the Harmonized System that covers: Anti-knock preparations; other than those based on lead compounds. This category encompasses all anti-knock preparations for internal combustion engines that do not contain lead compounds. These additives are crucial for modern fuels, improving octane ratings and preventing engine knocking, which can lead to engine damage and reduced fuel efficiency. Common non-lead anti-knock agents include oxygenates like MTBE and ethanol, as well as metallic compounds such as MMT. Key players in this trade are petroleum refiners, fuel additive manufacturers, and chemical companies, driven by the global demand for cleaner fuels and higher engine performance. The market is influenced by evolving fuel standards, advancements in engine technology, and stringent environmental regulations pushing for reduced emissions and improved combustion efficiency.
What products fall under HS code 381119?
Methyl tertiary-butyl ether (MTBE), Ethanol (as fuel additive), Methylcyclopentadienyl manganese tricarbonyl (MMT), Ferrocene, Tertiary-butyl alcohol (TBA), Isooctane, Toluene (as octane booster)
What are common misclassifications for HS code 381119?
This code is clearly distinguished from 381111, which specifically covers lead-based anti-knock preparations, reflecting the global transition to unleaded fuels.
Which countries are the top exporters of goods under HS code 381119?
In 2025, the top exporters of HS code 381119 in UN Comtrade data were India ($25M, 28% of world exports), the United States ($21M) and Spain ($9.0M). World exports came to about $91M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 81% of its exports here ($10M, CEPII BACI), so it may also belong among the top exporters.
Which countries are the top importers of goods under HS code 381119?
In 2025, the top importers of HS code 381119 in UN Comtrade data were Belgium ($25M, 17% of world imports), Saudi Arabia ($14M) and Germany ($10M). World imports came to about $149M, 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 381119 structured?
HS code 381119 is a 6-digit subheading under the Harmonized System. The first 2 digits (38) identify the chapter, digits 3-4 (11) identify the heading, and digits 5-6 (19) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 381119?
In Brazil, HS code 381119 is NCM 3811.19.00. The last two digits are 00 because Brazil does not split this HS code further.