HS code · 6-digit subheading
HS Code 2933.19 – Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other than henazone (antipyrin) and its derivatives
HS code 2933.19 is the 6-digit subheading for heterocyclic compounds, with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other than henazone (antipyrin) and its derivatives. It is used for phenylbutazone, celecoxib (active ingredient), fipronil (active ingredient), specific pyrazole-based ligands and pyrazole carboxylic acids.
What HS 2933.19 covers
This 'other' category encompasses a diverse range of heterocyclic compounds containing only nitrogen hetero-atoms and an unfused pyrazole ring, excluding phenazone and its derivatives. These compounds are crucial intermediates and active ingredients across various sectors, including pharmaceuticals, agrochemicals, and specialty chemicals. They serve as building blocks for complex drug molecules, pesticides, and dyes, leveraging the unique properties conferred by the pyrazole ring structure. Importers and exporters are typically chemical synthesis companies, pharmaceutical research and development firms, and agricultural chemical producers. Trade involves both bulk raw materials and highly purified intermediates, reflecting their broad utility in advanced chemical manufacturing and drug discovery.
- Covers
- Phenylbutazone
- Celecoxib (active ingredient)
- Fipronil (active ingredient)
- Specific pyrazole-based ligands
- Pyrazole carboxylic acids
- Examples
- Celebrex (Celecoxib)
- Frontline (Fipronil)
- Butazolidin (Phenylbutazone)
- specific research-grade pyrazole derivatives from chemical suppliers
Codes often confused with 2933.19
Common mistake. May be confused with other nitrogen heterocyclics (e.g., 293399) or even other drug categories (e.g., 3004) if not in bulk form, but the specific unfused pyrazole structure is the defining characteristic.
Top exporters and importers of HS code 293319, 2025
In 2025, the largest exporter of HS code 293319 in UN Comtrade data was Ireland, with 37% of world exports; the largest importer in UN Comtrade data was Portugal, with 35% 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 Ireland $2.7B 37% of world exports
- 2 Switzerland $2.6B 35% of world exports
- 3 Germany $783M 10% of world exports
World total: $7.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Portugal $2.7B 35% of world imports
- 2 Slovenia $1.5B 20% of world imports
- 3 Brazil $1.0B 14% of world imports
World total: $7.6B 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 2933.19 3
Brazil splits HS 2933.19 into 3 NCM codes, Mercosur's 8-digit tariff lines.
- 2933.19.1 Phenylbutazone and its saltsFenilbutazona e seus sais Group
- 2933.19.11 Phenylbutazone calciumFenilbutazona cálcica
- 2933.19.19 Phenylbutazone and salts other than calciumOutros
- 2933.19.90 Other unfused pyrazole ring compoundsOutros
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 2933.19
What is HS code 293319?
HS code 293319 is a 6-digit subheading in the Harmonized System that covers: Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other than henazone (antipyrin) and its derivatives. This 'other' category encompasses a diverse range of heterocyclic compounds containing only nitrogen hetero-atoms and an unfused pyrazole ring, excluding phenazone and its derivatives. These compounds are crucial intermediates and active ingredients across various sectors, including pharmaceuticals, agrochemicals, and specialty chemicals. They serve as building blocks for complex drug molecules, pesticides, and dyes, leveraging the unique properties conferred by the pyrazole ring structure. Importers and exporters are typically chemical synthesis companies, pharmaceutical research and development firms, and agricultural chemical producers. Trade involves both bulk raw materials and highly purified intermediates, reflecting their broad utility in advanced chemical manufacturing and drug discovery.
What products fall under HS code 293319?
Phenylbutazone, Celecoxib (active ingredient), Fipronil (active ingredient), specific pyrazole-based ligands, pyrazole carboxylic acids
What are common misclassifications for HS code 293319?
May be confused with other nitrogen heterocyclics (e.g., 293399) or even other drug categories (e.g., 3004) if not in bulk form, but the specific unfused pyrazole structure is the defining characteristic.
Which countries are the top exporters of goods under HS code 293319?
In 2025, the top exporters of HS code 293319 in UN Comtrade data were Ireland ($2.7B, 37% of world exports), Switzerland ($2.6B) and Germany ($783M). World exports came to about $7.5B, 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 293319?
In 2025, the top importers of HS code 293319 in UN Comtrade data were Portugal ($2.7B, 35% of world imports), Slovenia ($1.5B) and Brazil ($1.0B). World imports came to about $7.6B, 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 293319 structured?
HS code 293319 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 (19) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 293319?
Brazil splits HS code 293319 into 3 NCM codes: 2933.19.11 (Phenylbutazone calcium), 2933.19.19 (Phenylbutazone and salts other than calcium), 2933.19.90 (Other unfused pyrazole ring compounds). The first 6 digits of each match the HS code.