Hydrated Magnesium Oxide Powder
Hydrated magnesium oxide powder is a partially hydrated form of magnesium oxide (MgO·H2O) used in rubber compounding and flame retardants. It is classified under tariff item 2519.90.00 as 'other' magnesium oxide when derived from natural calcined sources, as hydration does not constitute a process beyond Chapter 25 Note 1.
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 |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is chemically precipitated magnesium hydroxide
Chemically produced magnesium hydroxide is classified in Chapter 28.
If the product is formulated as a flame-retardant compound with additives
Prepared chemical products with specific uses fall under Chapter 38.
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
• Verify that the hydration is incidental and the product is not a prepared additive for specific uses, which could shift classification
• Keep records of the natural magnesite source and hydration method for CBSA
Related Products under Tariff item 2519.90.00
Animal Feed Grade Magnesium Oxide
Coarse magnesium oxide powder formulated for livestock mineral supplements to prevent grass tetany. This product falls under tariff item 2519.90.00 as 'Other' magnesium oxide, suitable for feed but imported in bulk.
Caustic Calcined Magnesia Powder
Caustic calcined magnesia is magnesium oxide produced by low-temperature calcination of magnesite, yielding a reactive powder used in chemical and fertilizer industries. It falls under tariff item 2519.90.00 as 'other' magnesium oxide, since it is not fused or dead-burned and undergoes only calcination, a process permitted by Chapter 25 Note 1.
Caustic Calcined Magnesite 85/15 (MgO/SiO2)
Caustic calcined magnesite blend with 85% MgO and 15% SiO2, used for basic refractory brick production. This product falls under tariff item 2519.90.00 as 'Other' magnesium oxide, specifically caustic calcined magnesite, which is not further processed beyond calcination.
Caustic Calcined Magnesite Powder
Fine powder produced by calcining natural magnesite at moderate temperatures to yield reactive magnesium oxide with some residual CO2. This product is classified under tariff item 2519.90.00 as caustic calcined magnesite, a form of magnesium oxide.
CCM Fines Recovery Dust
Fine dust recovered from caustic calcined magnesite production, classified the same as the primary product. This product falls under tariff item 2519.90.00 as caustic calcined magnesite, regardless of particle size.
Dead-burned Magnesia 0-100mm for Rotary Kilns
Coarse-grained dead-burned magnesia sized 0-100mm, produced by sintering magnesite at high temperatures for use in rotary kiln linings. This product falls under tariff item 2519.90.00 as 'Other' magnesium oxide, specifically dead-burned magnesia, which is not further processed beyond sintering.