HS code · 6-digit subheading
HS Code 2933.52 – Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts
HS code 2933.52 is the 6-digit subheading for heterocyclic compounds, containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts. It is used for barbituric acid, pyrimidine, piperazine, malonylurea and uracil.
What HS 2933.52 covers
This HS code covers heterocyclic compounds containing a pyrimidine ring (whether or not hydrogenated) or a piperazine ring in their structure, including malonylurea (barbituric acid) and its salts. These compounds are crucial building blocks for a vast array of pharmaceuticals, agrochemicals, and specialty chemicals. They are traded by pharmaceutical intermediates suppliers, fine chemical manufacturers, and research institutions globally. Key aspects of their trade include their role as versatile synthetic precursors for complex molecules and the strict regulatory control surrounding certain derivatives, especially those with pharmacological activity.
- Covers
- Barbituric acid
- Pyrimidine
- Piperazine
- Malonylurea
- Uracil
- Thymine
- Cytosine
- Examples
- BASF (for intermediates)
- Lonza (for fine chemicals)
- Sigma-Aldrich (for research chemicals)
- Merck KGaA
Codes often confused with 2933.52
Common mistake. Can be confused with other heterocyclic nitrogen compounds (e.g., 2933.59 for 'other' pyrimidine or piperazine compounds) or even specific pharmaceutical preparations (Chapter 30) if formulated.
Top exporters and importers of HS code 293352, 2025
In 2025, the largest exporter of HS code 293352 in UN Comtrade data was China, with 65% of world exports; the largest importer in UN Comtrade data was India, 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 $10M 65% of world exports
- 2 South Korea $3.3M 21% of world exports
- 3 India $989K 6.4% of world exports
World total: $16M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 India $5.6M 39% of world imports
- 2 Germany $4.3M 30% of world imports
- 3 United States $1.9M 13% of world imports
World total: $14M 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 2933.52
Brazil does not split HS 2933.52: its NCM code is 2933.52.00.
All Brazil NCM codes in heading 29.33 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2933.52
What is HS code 293352?
HS code 293352 is a 6-digit subheading in the Harmonized System that covers: Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts. This HS code covers heterocyclic compounds containing a pyrimidine ring (whether or not hydrogenated) or a piperazine ring in their structure, including malonylurea (barbituric acid) and its salts. These compounds are crucial building blocks for a vast array of pharmaceuticals, agrochemicals, and specialty chemicals. They are traded by pharmaceutical intermediates suppliers, fine chemical manufacturers, and research institutions globally. Key aspects of their trade include their role as versatile synthetic precursors for complex molecules and the strict regulatory control surrounding certain derivatives, especially those with pharmacological activity.
What products fall under HS code 293352?
Barbituric acid, Pyrimidine, Piperazine, Malonylurea, Uracil, Thymine, Cytosine
What are common misclassifications for HS code 293352?
Can be confused with other heterocyclic nitrogen compounds (e.g., 2933.59 for 'other' pyrimidine or piperazine compounds) or even specific pharmaceutical preparations (Chapter 30) if formulated.
Which countries are the top exporters of goods under HS code 293352?
In 2025, the top exporters of HS code 293352 in UN Comtrade data were China ($10M, 65% of world exports), South Korea ($3.3M) and India ($989K). World exports came to about $16M, 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 293352?
In 2025, the top importers of HS code 293352 in UN Comtrade data were India ($5.6M, 39% of world imports), Germany ($4.3M) and the United States ($1.9M). World imports came to about $14M, 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 293352 structured?
HS code 293352 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (33) identify the heading, and digits 5-6 (52) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 293352?
In Brazil, HS code 293352 is NCM 2933.52.00. The last two digits are 00 because Brazil does not split this HS code further.