Magnesium Aluminate Spinel
Magnesium aluminate spinel (MgAl2O4) is a synthetic inorganic powder or granular material used for transparent ceramics in armor and optical windows. It qualifies as an aluminate salt under tariff item 2841.90.00, provided it is chemically defined and not yet sintered into ceramic articles.
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 the product contains binders or additives
Additives may move it out of Chapter 28.
If imported as sintered ceramic shapes
Sintered ceramic articles fall under Chapter 69.
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
• Confirm the product is in powder or granular form, not sintered, to stay under this heading
• Provide technical datasheets showing chemical purity
• If the spinel is doped or treated for specific uses, check if it remains classifiable here
Related Products under Tariff item 2841.90.00
ACS Reagent Potassium Stannate
ACS reagent grade potassium stannate (K2SnO3) is a chemically defined stannate salt used in analytical chemistry. It is a salt of stannic acid, an oxometallic acid, and falls under the 'Other' tariff item for salts of oxometallic acids.
Aluminum Sodium Oxide (Beta-Alumina)
Beta-alumina (NaAl11O17) is a solid electrolyte powder used in sodium-sulfur batteries. Its pure aluminate structure qualifies it as an oxometallic salt under tariff item 2841.90.00.
Ammonium Metavanadate
Ammonium metavanadate ((NH4)VO3) is a white crystalline powder used as a catalyst in the production of sulfuric acid, in ceramics, and as a drying agent in inks and paints. It is a salt of vanadic acid, an oxometallic acid, and meets the Chapter 28 definition of a separate chemically defined compound.
Ammonium Perrhenate Catalyst Precursor Flakes
Ammonium perrhenate in flake form (NH4ReO4) is a salt of perrhenic acid, a peroxometallic acid, used as a catalyst precursor for hydrocracking. It is a separate chemically defined compound under Chapter 28, falling under the 'Other' tariff item.
Ammonium Perrhenate (NH4ReO4) Powder
Ammonium perrhenate powder (NH4ReO4) is the ammonium salt of perrhenic acid, a peroxometallic acid, used in catalysts and alloy production. It is a separate chemically defined compound under Chapter 28, falling under the 'Other' tariff item.
Anhydrous Potassium Stannate
Anhydrous potassium stannate (K2SnO3) is a high-purity, water-free compound used in advanced electroplating solutions to produce corrosion-resistant tin coatings. It is classified under tariff item 2841.90.00 as a potassium salt of stannic acid, an oxometallic acid salt.