Product classification
HS code for Didecyl phthalate: 2917.33
Acids, aromatic polycarboxylic acids, dinonyl or didecyl orthophthalates.
Classification of didecyl phthalate under HS 2917.33
Didecyl phthalate is classified under HS code 2917.33. This classification is determined by its status as an aromatic polycarboxylic acid derivative within Chapter 29 of the Harmonized System. Specifically, heading 2917 covers polycarboxylic acids, their anhydrides, halides, peroxides, and peroxyacids, along with their halogenated, sulfonated, nitrated, or nitrosated derivatives. Didecyl phthalate is an ester of orthophthalic acid. The Harmonized System provides a specific subheading, 2917.33, for dinonyl or didecyl orthophthalates. This classification is based on the length of the alkyl chains (ten carbon atoms for decyl) attached to the phthalate structure. As a plasticizer used extensively in the polymer industry, it is classified here as a chemically defined compound. If the product is a mixture of different phthalates not meeting the definition of a single compound, it might fall elsewhere, but pure didecyl phthalate is strictly 2917.33.
- Covers
- Didecyl orthophthalate
- DDP
- Di-n-decyl phthalate
- Esters of orthophthalic acid with decyl alcohol
- Plasticizer grade didecyl phthalate
- Also under 2917.33
- BASF's Palatinol DINP
- ExxonMobil Chemical's Jayflex DIDP
- Evonik's Vestinol DINP
- Hanwha Total Petrochemical's DIDP
Codes often confused with 2917.33
Common mistake. This product is often misclassified under HS code 2917.32, which is reserved for dioctyl orthophthalates (such as DEHP or DOP), or HS code 2917.34, which covers other esters of orthophthalic acid. The distinction relies entirely on the carbon chain length of the alcohol used in the esterification process. Additionally, if the product is sold as a prepared plasticizer mixture, it may be incorrectly declared under HS code 3812.20, which covers compound plasticizers for rubber or plastics.
Top exporters and importers of HS 291733 (the code used for didecyl phthalate), 2025
In 2025, the largest exporter of HS 291733 (the code used for didecyl phthalate) in UN Comtrade data was the Netherlands, with 34% of world exports; the largest importer in UN Comtrade data was Italy, with 9.7% 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 291733, not only didecyl phthalate.
Top exporters 2025 · share of world exports
- 1 Netherlands $281M 34% of world exports
- 2 Germany $214M 26% of world exports
- 3 China $65M 7.9% of world exports
World total: $829M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Italy $90M 9.7% of world imports
- 2 Germany $80M 8.7% of world imports
- 3 Japan $66M 7.1% of world imports
World total: $924M 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 didecyl phthalate
Brazil classifies didecyl phthalate under NCM 2917.33.00: HS 2917.33 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about didecyl phthalate
What is the HS code for Didecyl phthalate?
The HS code for Didecyl phthalate is 291733 (Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates). The HS code for Didecyl phthalate is 2917.33, covering dinonyl or didecyl orthophthalates.
How do I classify Didecyl phthalate for customs?
Didecyl phthalate is classified under HS code 291733 — Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates. This is a 6-digit subheading level code.
How does it differ from Diisodecyl phthalate (DIDP)?
DIDP is an isomer of didecyl phthalate and is generally classified under the same HS code, 2917.33, as they share the same molecular formula and basic orthophthalate structure.
Which countries are the top exporters of didecyl phthalate (HS 291733)?
In 2025, the top exporters of HS 291733 (the code used for didecyl phthalate) in UN Comtrade data were the Netherlands ($281M, 34% of world exports), Germany ($214M) and China ($65M). World exports came to about $829M, 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 didecyl phthalate (HS 291733)?
In 2025, the top importers of HS 291733 (the code used for didecyl phthalate) in UN Comtrade data were Italy ($90M, 9.7% of world imports), Germany ($80M) and Japan ($66M). World imports came to about $924M, 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 Didecyl phthalate the same in all countries?
The base HS code 291733 for Didecyl phthalate 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 didecyl phthalate in Brazil?
In Brazil, didecyl phthalate (HS 291733) is classified under NCM 2917.33.00.