Product classification
HS code for Dimethyl phosphite: 2920.21
Esters, phosphite esters and their salts, their halogenated, sulphonated, nitrated or nitrosated derivatives, dimethyl phosphite.
Classification of dimethyl phosphite under HS 2920.21
Dimethyl phosphite is classified under HS code 2920.21. This classification is based on its chemical identity as an ester of an inorganic acid. Heading 2920 covers esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts. In the 2017 and 2022 HS updates, specific subheadings were created under 2920.20 for phosphite esters to better track chemicals of concern. Dimethyl phosphite is explicitly named in subheading 2920.21. The classification logic follows GRI 1, as the text of the heading and subheadings specifically describes the product. As an organophosphorus compound, it is distinguished from phosphoric esters (2919) by the oxidation state of the phosphorus atom and the specific ester linkage.
- Covers
- Dimethyl phosphite
- Dimethyl hydrogen phosphite
- Phosphonic acid, dimethyl ester
- DMP (Chemical abbreviation)
- Also under 2920.21
- Lanxess (specialty chemicals)
- Arkema (chemical intermediates)
- Jiangsu Yangnong Chemical Group (agrochemical intermediates)
Codes often confused with 2920.21
Common mistake. Dimethyl phosphite is often misclassified under HS code 2920.29, which is the residual category for "other" phosphite esters. Because 2920.21 is a specific named code, using 2920.29 is a compliance error. It is also occasionally confused with 2919.90 (phosphoric esters), but dimethyl phosphite is a phosphite (phosphonate) rather than a phosphate. Another common error is classification under 2931.39 (other organo-phosphorus derivatives), but since it is an ester of an inorganic acid specifically provided for in 2920, that heading takes precedence over the more general organo-inorganic heading 2931.
Top exporters and importers of HS 292021 (the code used for dimethyl phosphite), 2025
In 2025, the largest exporter of HS 292021 (the code used for dimethyl phosphite) in UN Comtrade data was Germany, with 50% of world exports; the largest importer in UN Comtrade data was the United States, with 32% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 292021, not only dimethyl phosphite.
Top exporters 2025 · share of world exports
- 1 Germany $3.2M 50% of world exports
- 2 India $1.2M 19% of world exports
- 3 United States $1.1M 17% of world exports
World total: $6.4M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $1.9M 32% of world imports
- 2 Italy $977K 16% of world imports
- 3 Poland $789K 13% of world imports
World total: $6.0M 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 dimethyl phosphite
Brazil classifies dimethyl phosphite under NCM 2920.21.00: HS 2920.21 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dimethyl phosphite
What is the HS code for Dimethyl phosphite?
The HS code for Dimethyl phosphite is 292021 (Esters; phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, dimethyl phosphite). The HS code for Dimethyl phosphite is 2920.21.
How do I classify Dimethyl phosphite for customs?
Dimethyl phosphite is classified under HS code 292021 — Esters; phosphite esters and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives, dimethyl phosphite. This is a 6-digit subheading level code.
Why is Dimethyl phosphite specifically listed in the HS nomenclature?
It is specifically listed to facilitate the monitoring of trade in chemicals that can be used as precursors for organophosphorus pesticides or chemical warfare agents, ensuring better international oversight.
Which countries are the top exporters of dimethyl phosphite (HS 292021)?
In 2025, the top exporters of HS 292021 (the code used for dimethyl phosphite) in UN Comtrade data were Germany ($3.2M, 50% of world exports), India ($1.2M) and the United States ($1.1M). World exports came to about $6.4M, 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 dimethyl phosphite (HS 292021)?
In 2025, the top importers of HS 292021 (the code used for dimethyl phosphite) in UN Comtrade data were the United States ($1.9M, 32% of world imports), Italy ($977K) and Poland ($789K). World imports came to about $6.0M, 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.
Is the HS code for Dimethyl phosphite the same in all countries?
The base HS code 292021 for Dimethyl phosphite is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for dimethyl phosphite in Brazil?
In Brazil, dimethyl phosphite (HS 292021) is classified under NCM 2920.21.00.