HS code · 6-digit subheading

HS Code 2933.11 – Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, phenazone (antipyrin) and its derivatives

HS code 2933.11 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, phenazone (antipyrin) and its derivatives. It is used for phenazone (Antipyrin), propyphenazone, metamizole (Dipyrone), aminophenazone and nifenazone.

What HS 2933.11 covers

This HS code specifically covers Phenazone (Antipyrin) and its derivatives, which are heterocyclic compounds containing only nitrogen hetero-atoms and an unfused pyrazole ring. Historically, phenazone was widely used as an analgesic and antipyretic, though its use has become more limited due to the availability of safer alternatives. Today, these compounds find niche applications in certain pharmaceutical formulations, as intermediates in the synthesis of other drugs, and in chemical research. Trade is primarily driven by pharmaceutical manufacturers, bulk drug producers, and fine chemical suppliers. Importers and exporters are typically companies involved in the production of active pharmaceutical ingredients (APIs) or specialized chemical synthesis, often dealing in bulk powder form for further processing.

Covers
  • Phenazone (Antipyrin)
  • Propyphenazone
  • Metamizole (Dipyrone)
  • Aminophenazone
  • Nifenazone
Examples
  • Novalgin (Metamizole)
  • Saridon (contains Propyphenazone)
  • specific generic phenazone products
  • research-grade antipyrin

Codes often confused with 2933.11

Common mistake. Can be confused with other non-steroidal anti-inflammatory drugs (NSAIDs) under 293399 or other analgesic compounds in Chapter 29, but the pyrazole ring and specific derivatives are key here.

2933.99Heterocyclic compounds; n.e.c. in headings no. 2933

Top exporters and importers of HS code 293311, 2025

In 2025, the largest exporter of HS code 293311 in UN Comtrade data was Germany, with 45% of world exports; the largest importer in UN Comtrade data was Brazil, with 45% 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. 1 Germany $29M
  2. 2 China $12M
  3. 3 India $10M

World total: $65M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Brazil $79M
  2. 2 Spain $17M
  3. 3 Romania $12M

World total: $175M 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 2933.11 5

Brazil splits HS 2933.11 into 5 NCM codes, Mercosur's 8-digit tariff lines.

  1. 2933.11.1 1-Phenyl-2,3-dimethyl-5-pyrazolone-4-methylaminomethanesulphonic acid and its saltsÁcido 1-fenil-2,3-dimetil-5-pirazolona-4-metilaminometanossulfônico e seus sais Group
  2. 2933.11.11 Dipyrone (metamizole sodium)Dipirona
  3. 2933.11.12 Magnopyrol (magnesium dipyrone)Magnopirol (dipirona magnésica)
  4. 2933.11.19 Noramidopyrine methanesulphonic acid, other saltsOutros
  5. 2933.11.20 Methylene-bis(4-methylaminoantipyrine)Metileno-bis(4-metilamino-1-fenil-2,3-dimetil)pirazolona
  6. 2933.11.90 Other phenazone (antipyrin) and its derivativesOutros

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 2933.11

What is HS code 293311?

HS code 293311 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, phenazone (antipyrin) and its derivatives. This HS code specifically covers Phenazone (Antipyrin) and its derivatives, which are heterocyclic compounds containing only nitrogen hetero-atoms and an unfused pyrazole ring. Historically, phenazone was widely used as an analgesic and antipyretic, though its use has become more limited due to the availability of safer alternatives. Today, these compounds find niche applications in certain pharmaceutical formulations, as intermediates in the synthesis of other drugs, and in chemical research. Trade is primarily driven by pharmaceutical manufacturers, bulk drug producers, and fine chemical suppliers. Importers and exporters are typically companies involved in the production of active pharmaceutical ingredients (APIs) or specialized chemical synthesis, often dealing in bulk powder form for further processing.

What products fall under HS code 293311?

Phenazone (Antipyrin), Propyphenazone, Metamizole (Dipyrone), Aminophenazone, Nifenazone

What are common misclassifications for HS code 293311?

Can be confused with other non-steroidal anti-inflammatory drugs (NSAIDs) under 293399 or other analgesic compounds in Chapter 29, but the pyrazole ring and specific derivatives are key here.

Which countries are the top exporters of goods under HS code 293311?

In 2025, the top exporters of HS code 293311 in UN Comtrade data were Germany ($29M, 45% of world exports), China ($12M) and India ($10M). World exports came to about $65M, 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 293311?

In 2025, the top importers of HS code 293311 in UN Comtrade data were Brazil ($79M, 45% of world imports), Spain ($17M) and Romania ($12M). World imports came to about $175M, 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 293311 structured?

HS code 293311 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 (11) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 293311?

Brazil splits HS code 293311 into 5 NCM codes: 2933.11.11 (Dipyrone (metamizole sodium)), 2933.11.12 (Magnopyrol (magnesium dipyrone)), 2933.11.19 (Noramidopyrine methanesulphonic acid, other salts), 2933.11.20 (Methylene-bis(4-methylaminoantipyrine)), 2933.11.90 (Other phenazone (antipyrin) and its derivatives). The first 6 digits of each match the HS code.