Trimanganese Tetraoxide (Mn3O4) Powder
Trimanganese tetraoxide (Mn3O4) powder is a mixed-valence manganese oxide used in the production of ferrites for magnetic applications and as a sintering aid in ceramics. As a chemically defined inorganic compound of manganese, it is not excluded by Chapter 28 notes. It is classified under tariff item 2820.90.00 as other manganese oxides, covering oxides not specifically named elsewhere.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as finished ferrite magnets or parts
Finished magnetic articles are classified in Chapter 85.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Specify the exact chemical formula (Mn3O4) and purity level on the commercial invoice to avoid confusion with MnO2
• If the product is used for ferrite production, note that it is not a prepared magnetic material, which would fall under Chapter 85
• Keep a certificate of analysis to support the classification in case of CBSA inspection
Related Products under Tariff item 2820.90.00
Electrolytic Manganese Dioxide (EMD)
Electrolytic manganese dioxide (EMD) is a high-purity form of manganese dioxide produced through an electrolytic process. It is primarily used as the cathode material in lithium-ion and alkaline batteries. As a chemically defined inorganic oxide of manganese, it falls under tariff item 2820.90.00 for other manganese oxides.
Manganese Dioxide (MnO2) Powder
Manganese dioxide (MnO2) powder is a high-purity inorganic compound used extensively in the production of dry-cell batteries, such as alkaline and zinc-carbon types. It is a chemically defined metal oxide, meeting the criteria of Chapter 28. As it is not specifically named elsewhere, it is classified under tariff item 2820.90.00 for other manganese oxides.
Manganese Oxide Nanoparticles
Manganese oxide nanoparticles are nano-sized particles of manganese dioxide (MnO2) used as catalysts in chemical reactions and water treatment applications. Despite their nanoscale form, they remain a chemically defined inorganic oxide of manganese. They are classified under tariff item 2820.90.00 as other manganese oxides, consistent with Chapter 28's coverage of separate chemically defined compounds.
Synthetic Manganese(IV) Oxide for Ceramics
Synthetic manganese(IV) oxide (MnO2) for ceramics is a manufactured form of manganese dioxide used as a colorant and flux in ceramic glazes and tiles, imparting black-brown hues. It is a chemically defined inorganic oxide, not excluded by Chapter 28 notes. It is classified under tariff item 2820.90.00 as other manganese oxides, as it is not a natural product of Section V.