HS code · 6-digit subheading
HS Code 2833.40 – Peroxosulphates (persulphates)
HS code 2833.40 is the 6-digit subheading for peroxosulphates (persulphates). It is used for ammonium persulphate, potassium persulphate, sodium persulphate, peroxodisulphate and peroxomonosulphate.
What HS 2833.40 covers
This category encompasses peroxosulphates, also known as persulphates, which are potent oxidizing agents. Prominent examples include ammonium persulphate, potassium persulphate, and sodium persulphate. These chemicals are extensively employed in the polymer industry as initiators for polymerization reactions, in electronics for etching printed circuit boards, as active ingredients in hair bleaching products, and in water treatment for various oxidation processes. Chemical manufacturers and distributors are the primary importers and exporters of these compounds. The trade in peroxosulphates is largely driven by the demand from high-tech manufacturing sectors and the consumer goods industry. Important aspects for trade include their stability, purity, and the necessity for safe handling due to their strong oxidizing properties. Regulatory compliance for the transport and storage of these hazardous materials is a significant factor in international trade.
- Covers
- Ammonium persulphate
- Potassium persulphate
- Sodium persulphate
- Peroxodisulphate
- Peroxomonosulphate
- Tetrapotassium peroxydiphosphate
- Examples
- Hair Bleach (L'Oréal, Wella)
- PCB Etchants (various chemical suppliers)
- Polymerization Initiators (BASF, Arkema)
- Water Treatment Oxidizers
Codes often confused with 2833.40
Common mistake. Peroxosulphates should not be confused with regular sulphates (2833.2x) as their chemical structure and powerful oxidizing properties are distinct.
Top exporters and importers of HS code 283340, 2025
In 2025, the largest exporter of HS code 283340 in UN Comtrade data was the United States, with 29% of world exports; the largest importer in UN Comtrade data was Italy, with 11% 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 United States $37M 29% of world exports
- 2 China $35M 27% of world exports
- 3 Japan $14M 11% of world exports
World total: $130M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Italy $17M 11% of world imports
- 2 South Korea $12M 7.3% of world imports
- 3 United States $11M 7.0% of world imports
World total: $159M 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 2833.40 3
Brazil splits HS 2833.40 into 3 NCM codes, Mercosur's 8-digit tariff lines.
- 2833.40.10 Sodium peroxosulphate (persulphate)De sódio
- 2833.40.20 Ammonium peroxosulphate (persulphate)De amônio
- 2833.40.90 Other peroxosulphates (persulphates)Outros
All Brazil NCM codes in heading 28.33 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2833.40
What is HS code 283340?
HS code 283340 is a 6-digit subheading in the Harmonized System that covers: Peroxosulphates (persulphates). This category encompasses peroxosulphates, also known as persulphates, which are potent oxidizing agents. Prominent examples include ammonium persulphate, potassium persulphate, and sodium persulphate. These chemicals are extensively employed in the polymer industry as initiators for polymerization reactions, in electronics for etching printed circuit boards, as active ingredients in hair bleaching products, and in water treatment for various oxidation processes. Chemical manufacturers and distributors are the primary importers and exporters of these compounds. The trade in peroxosulphates is largely driven by the demand from high-tech manufacturing sectors and the consumer goods industry. Important aspects for trade include their stability, purity, and the necessity for safe handling due to their strong oxidizing properties. Regulatory compliance for the transport and storage of these hazardous materials is a significant factor in international trade.
What products fall under HS code 283340?
Ammonium persulphate, Potassium persulphate, Sodium persulphate, Peroxodisulphate, Peroxomonosulphate, Tetrapotassium peroxydiphosphate
What are common misclassifications for HS code 283340?
Peroxosulphates should not be confused with regular sulphates (2833.2x) as their chemical structure and powerful oxidizing properties are distinct.
Which countries are the top exporters of goods under HS code 283340?
In 2025, the top exporters of HS code 283340 in UN Comtrade data were the United States ($37M, 29% of world exports), China ($35M) and Japan ($14M). World exports came to about $130M, 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 283340?
In 2025, the top importers of HS code 283340 in UN Comtrade data were Italy ($17M, 11% of world imports), South Korea ($12M) and the United States ($11M). World imports came to about $159M, 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 283340 structured?
HS code 283340 is a 6-digit subheading under the Harmonized System. The first 2 digits (28) identify the chapter, digits 3-4 (33) identify the heading, and digits 5-6 (40) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 283340?
Brazil splits HS code 283340 into 3 NCM codes: 2833.40.10 (Sodium peroxosulphate (persulphate)), 2833.40.20 (Ammonium peroxosulphate (persulphate)), 2833.40.90 (Other peroxosulphates (persulphates)). The first 6 digits of each match the HS code.