Product classification
HS code for Barbituric acid: 2933.52
Heterocyclic compounds, containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts.
Classification of barbituric acid under HS 2933.52
Barbituric acid is classified under Harmonized System (HS) code 293352. This classification falls within Chapter 29, which covers "Organic chemicals." Specifically, heading 2933 is dedicated to "Heterocyclic compounds with nitrogen hetero-atom(s) only." Barbituric acid is a heterocyclic compound containing a pyrimidine ring in its structure. Subheading 293352 explicitly identifies "Malonylurea (barbituric acid) and its salts." This precise description directly matches the chemical identity of barbituric acid, which is also known as malonylurea. The presence of the pyrimidine ring and its specific naming within the HS nomenclature ensures its accurate classification under this code, distinguishing it from other organic chemicals.
- Covers
- Malonylurea (Barbituric acid)
- Sodium barbiturate
- Potassium barbiturate
- Other salts of barbituric acid
- Also under 2933.52
- BASF (for intermediates)
- Lonza (for fine chemicals)
- Sigma-Aldrich (for research chemicals)
- Merck KGaA
Codes often confused with 2933.52
Common mistake. Barbituric acid can sometimes be confused with other organic compounds. For instance, HS 293359 covers "Other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure." However, 293352 is a more specific classification for barbituric acid and its salts, taking precedence over the general "other" category. Another potential misclassification might involve HS 2924, which covers "Carboxyamide-function compounds; amide-function compounds of carbonic acid." While barbituric acid contains amide groups, its primary classification is determined by its heterocyclic ring structure, which places it firmly under 2933.
Top exporters and importers of HS 293352 (the code used for barbituric acid), 2025
In 2025, the largest exporter of HS 293352 (the code used for barbituric acid) 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.
Figures cover everything classified under HS 293352, not only barbituric acid.
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 barbituric acid
Brazil classifies barbituric acid under NCM 2933.52.00: HS 2933.52 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about barbituric acid
What is the HS code for Barbituric acid?
The HS code for Barbituric acid is 293352 (Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts). The HS code for Barbituric acid is 293352.
How do I classify Barbituric acid for customs?
Barbituric acid is classified under HS code 293352 — Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, malonylurea (barbituric acid) and its salts. This is a 6-digit subheading level code.
Are derivatives of barbituric acid also classified under 293352?
HS 293352 specifically includes barbituric acid (malonylurea) and its salts. Other derivatives of barbituric acid, which are not salts, would require individual assessment based on their specific chemical structure and functional groups, and might be classified under other subheadings within 2933 or elsewhere in Chapter 29, depending on their exact chemical composition.
Which countries are the top exporters of barbituric acid (HS 293352)?
In 2025, the top exporters of HS 293352 (the code used for barbituric acid) 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 barbituric acid (HS 293352)?
In 2025, the top importers of HS 293352 (the code used for barbituric acid) 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.
Is the HS code for Barbituric acid the same in all countries?
The base HS code 293352 for Barbituric acid 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 barbituric acid in Brazil?
In Brazil, barbituric acid (HS 293352) is classified under NCM 2933.52.00.