Product classification
HS code for Isocyanates: 2929.10
Nitrogen-function compounds, n.e.c. in chapter 29, isocyanates.
Classification of isocyanates under HS 2929.10
Isocyanates are classified under HS code 292910, which resides within Chapter 29 of the Harmonized System, dedicated to organic chemicals. Heading 2929 covers "Other nitrogen-function compounds," and subheading 292910 specifically identifies isocyanates. These are organic compounds containing the isocyanate functional group (-N=C=O). They are highly reactive and serve as essential raw materials in the production of polyurethanes, coatings, and adhesives. Classification here requires the substance to be a separate chemically defined organic compound, whether or not containing impurities. If the isocyanate is part of a prepared mixture or a prepolymer, the classification may shift to other chapters. The precision of 292910 ensures that these specific nitrogen-function chemicals are tracked accurately for trade statistics and regulatory compliance, particularly given their significance in industrial chemistry and safety regulations. Importers must verify the chemical purity and molecular structure to ensure the product does not fall into a broader category of chemical mixtures or finished plastic resins.
- Covers
- Methyl diphenyl diisocyanate (MDI)
- Toluene diisocyanate (TDI)
- Hexamethylene diisocyanate (HDI)
- Isophorone diisocyanate (IPDI)
- Pure organic isocyanate monomers
- Also under 2929.10
- Covestro's TDI
- BASF's MDI
- Wanhua Chemical's HDI
- Dow Chemical's Polyurethane Systems
Codes often confused with 2929.10
Common mistake. Isocyanates are often misclassified under HS code 390950 if they have already been reacted into polyurethanes. Another common error is using HS code 382499 for chemical mixtures; however, if the product is a chemically defined isocyanate, 292910 takes precedence. Misclassification also occurs with isocyanides (carbylamines), which are distinct from isocyanates.
Top exporters and importers of HS 292910 (the code used for isocyanates), 2025
In 2025, the largest exporter of HS 292910 (the code used for isocyanates) in UN Comtrade data was China, with 27% of world exports; the largest importer in UN Comtrade data was China, with 6.7% 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 292910, not only isocyanates.
Top exporters 2025 · share of world exports
- 1 China $1.4B 27% of world exports
- 2 South Korea $748M 15% of world exports
- 3 Germany $586M 12% of world exports
World total: $5.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $347M 6.7% of world imports
- 2 India $325M 6.3% of world imports
- 3 Italy $260M 5.0% of world imports
World total: $5.2B 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 isocyanates
Brazil splits HS 2929.10 into 5 NCM codes. Pick the one that matches your product:
- 2929.10.10Diphenylmethane diisocyanate (MDI)
- 2929.10.21Toluene diisocyanate (TDI), isomer mixture
- 2929.10.29Other toluene diisocyanates
- 2929.10.303,4-Dichlorophenyl isocyanate
- 2929.10.90Other isocyanates
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about isocyanates
What is the HS code for Isocyanates?
The HS code for Isocyanates is 292910 (Nitrogen-function compounds; n.e.c. in chapter 29, isocyanates). The HS code for isocyanates as separate chemically defined organic compounds is 292910.
How do I classify Isocyanates for customs?
Isocyanates is classified under HS code 292910 — Nitrogen-function compounds; n.e.c. in chapter 29, isocyanates. This is a 6-digit subheading level code.
Are polyurethane resins classified under this code?
No, polyurethane resins in primary forms are classified under HS code 390950. HS code 292910 is strictly for the isocyanate chemical precursors.
Which countries are the top exporters of isocyanates (HS 292910)?
In 2025, the top exporters of HS 292910 (the code used for isocyanates) in UN Comtrade data were China ($1.4B, 27% of world exports), South Korea ($748M) and Germany ($586M). World exports came to about $5.0B, 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 isocyanates (HS 292910)?
In 2025, the top importers of HS 292910 (the code used for isocyanates) in UN Comtrade data were China ($347M, 6.7% of world imports), India ($325M) and Italy ($260M). World imports came to about $5.2B, 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 Isocyanates the same in all countries?
The base HS code 292910 for Isocyanates 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 isocyanates in Brazil?
Brazil splits HS 292910 into 5 NCM codes, so the right one for isocyanates depends on the product's details: 2929.10.10 (Diphenylmethane diisocyanate (MDI)), 2929.10.21 (Toluene diisocyanate (TDI), isomer mixture), 2929.10.29 (Other toluene diisocyanates), 2929.10.30 (3,4-Dichlorophenyl isocyanate), 2929.10.90 (Other isocyanates).