HS code · 6-digit subheading
HS Code 3824.91 – Chemical products, mixtures and preparations; consisting mainly of (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate
HS code 3824.91 is the 6-digit subheading for chemical products, mixtures and preparations, consisting mainly of (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate. It is used for non-halogenated flame retardant masterbatches, polymer fire-resistant additives, electronic encapsulant formulations, fire-retardant coatings and textile flameproofing agents.
What HS 3824.91 covers
This highly specific HS code identifies chemical mixtures consisting mainly of two complex phosphinate compounds: (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate. These substances are advanced, non-halogenated flame retardants, primarily used in high-performance applications for polymers, electronics, and textiles where fire safety is paramount and environmental concerns about halogenated alternatives are present. Importers and exporters are specialized chemical manufacturers, polymer compounders, and industries producing electronics, automotive components, and high-tech textiles. Key aspects include their role in meeting stringent fire safety standards, the demand for 'green' flame retardant solutions, and the need for precise formulation to achieve desired material properties without compromising performance.
- Covers
- Non-halogenated flame retardant masterbatches
- Polymer fire-resistant additives
- Electronic encapsulant formulations
- Fire-retardant coatings
- Textile flameproofing agents
- Examples
- Clariant Exolit OP series
- Lanxess Disflamoll
- specific fire-resistant plastics for consumer electronics
- automotive interior fire-retardant materials
Codes often confused with 3824.91
Common mistake. Due to its precise chemical definition, misclassification is less common, but general flame retardants might be incorrectly placed under 382499 if the specific chemical structure is not identified.
Top exporters and importers of HS code 382491, 2025
In 2025, the largest exporter of HS code 382491 in UN Comtrade data was the United States, with 47% 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 United States $76M 47% of world exports
- 2 Namibia $31M 19% of world exports
- 3 United Kingdom $8.6M 5.2% of world exports
World total: $163M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 France $47M 17% of world imports
- 2 Malaysia $31M 11% of world imports
- 3 Zambia* ~$31M 11% of world imports · partner records ↗
World total: $278M 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 3824.91
Brazil does not split HS 3824.91: its NCM code is 3824.91.00.
All Brazil NCM codes in heading 38.24 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 3824.91
What is HS code 382491?
HS code 382491 is a 6-digit subheading in the Harmonized System that covers: Chemical products, mixtures and preparations; consisting mainly of (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate. This highly specific HS code identifies chemical mixtures consisting mainly of two complex phosphinate compounds: (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate. These substances are advanced, non-halogenated flame retardants, primarily used in high-performance applications for polymers, electronics, and textiles where fire safety is paramount and environmental concerns about halogenated alternatives are present. Importers and exporters are specialized chemical manufacturers, polymer compounders, and industries producing electronics, automotive components, and high-tech textiles. Key aspects include their role in meeting stringent fire safety standards, the demand for 'green' flame retardant solutions, and the need for precise formulation to achieve desired material properties without compromising performance.
What products fall under HS code 382491?
Non-halogenated flame retardant masterbatches, polymer fire-resistant additives, electronic encapsulant formulations, fire-retardant coatings, textile flameproofing agents
What are common misclassifications for HS code 382491?
Due to its precise chemical definition, misclassification is less common, but general flame retardants might be incorrectly placed under 382499 if the specific chemical structure is not identified.
Which countries are the top exporters of goods under HS code 382491?
In 2025, the top exporters of HS code 382491 in UN Comtrade data were the United States ($76M, 47% of world exports), Namibia ($31M) and the United Kingdom ($8.6M). World exports came to about $163M, 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 382491?
In 2025, the top importers of HS code 382491 in UN Comtrade data were France ($47M, 17% of world imports), Malaysia ($31M) and Zambia (about $31M). World imports came to about $278M, 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 382491 structured?
HS code 382491 is a 6-digit subheading under the Harmonized System. The first 2 digits (38) identify the chapter, digits 3-4 (24) identify the heading, and digits 5-6 (91) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 382491?
In Brazil, HS code 382491 is NCM 3824.91.00. The last two digits are 00 because Brazil does not split this HS code further.