HS code · 6-digit subheading
HS Code 2931.41 – Non-halogenated organo-phosphorous derivatives; dimethyl methylphosphonate
HS code 2931.41 is the 6-digit subheading for non-halogenated organo-phosphorous derivatives, dimethyl methylphosphonate. It is used for dimethyl methylphosphonate, DMMP, methylphosphonic acid dimethyl ester, flame retardant DMMP and nerve agent simulant.
What HS 2931.41 covers
Dimethyl methylphosphonate (DMMP) is a non-halogenated organo-phosphorous compound primarily traded for its diverse industrial applications, notably as a flame retardant, a plasticizer, and an intermediate in the synthesis of other chemicals. It is also recognized for its use as a simulant for nerve agents, which places its international trade under scrutiny and control, particularly under the Chemical Weapons Convention (CWC). Major importers are typically countries with robust manufacturing sectors for plastics, textiles, and specialty chemicals, as well as those involved in defense-related research or production. Exporters are usually large chemical producers in industrialized nations. Key things to know include its dual-use nature, which necessitates careful compliance with export controls and non-proliferation treaties. Its effectiveness as a flame retardant makes it valuable in materials science, while its role as a chemical warfare agent simulant means that trade is often monitored by international bodies and national security agencies.
- Covers
- Dimethyl methylphosphonate
- DMMP
- Methylphosphonic acid dimethyl ester
- Flame retardant DMMP
- Nerve agent simulant
- Plasticizer
- Examples
- Sigma-Aldrich DMMP
- TCI DMMP
- Merck DMMP
- Alfa Aesar DMMP
Codes often confused with 2931.41
Common mistake. DMMP could be confused with other organo-phosphorous compounds, especially other phosphonates in 2931.49 or general organo-phosphorus compounds in 2931.90, if its specific identity is not clearly declared.
Top exporters and importers of HS code 293141, 2025
In 2025, the largest exporter of HS code 293141 in UN Comtrade data was China, with 49% of world exports; the largest importer in UN Comtrade data was Germany, with 39% 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 China $1.7M 49% of world exports
- 2 India $1.0M 29% of world exports
- 3 United States $134K 3.9% of world exports
World total: $3.4M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $1.4M 39% of world imports
- 2 United States $640K 17% of world imports
- 3 South Korea $401K 11% of world imports
World total: $3.7M 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 2931.41
Brazil does not split HS 2931.41: its NCM code is 2931.41.00.
All Brazil NCM codes in heading 29.31 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2931.41
What is HS code 293141?
HS code 293141 is a 6-digit subheading in the Harmonized System that covers: Non-halogenated organo-phosphorous derivatives; dimethyl methylphosphonate. Dimethyl methylphosphonate (DMMP) is a non-halogenated organo-phosphorous compound primarily traded for its diverse industrial applications, notably as a flame retardant, a plasticizer, and an intermediate in the synthesis of other chemicals. It is also recognized for its use as a simulant for nerve agents, which places its international trade under scrutiny and control, particularly under the Chemical Weapons Convention (CWC). Major importers are typically countries with robust manufacturing sectors for plastics, textiles, and specialty chemicals, as well as those involved in defense-related research or production. Exporters are usually large chemical producers in industrialized nations. Key things to know include its dual-use nature, which necessitates careful compliance with export controls and non-proliferation treaties. Its effectiveness as a flame retardant makes it valuable in materials science, while its role as a chemical warfare agent simulant means that trade is often monitored by international bodies and national security agencies.
What products fall under HS code 293141?
Dimethyl methylphosphonate, DMMP, Methylphosphonic acid dimethyl ester, Flame retardant DMMP, Nerve agent simulant, Plasticizer
What are common misclassifications for HS code 293141?
DMMP could be confused with other organo-phosphorous compounds, especially other phosphonates in 2931.49 or general organo-phosphorus compounds in 2931.90, if its specific identity is not clearly declared.
Which countries are the top exporters of goods under HS code 293141?
In 2025, the top exporters of HS code 293141 in UN Comtrade data were China ($1.7M, 49% of world exports), India ($1.0M) and the United States ($134K). World exports came to about $3.4M, 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 293141?
In 2025, the top importers of HS code 293141 in UN Comtrade data were Germany ($1.4M, 39% of world imports), the United States ($640K) and South Korea ($401K). World imports came to about $3.7M, 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 293141 structured?
HS code 293141 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (31) identify the heading, and digits 5-6 (41) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 293141?
In Brazil, HS code 293141 is NCM 2931.41.00. The last two digits are 00 because Brazil does not split this HS code further.