HS Code for Magnesium oxide

Magnesium oxide is classified under HS code 2519.90, which encompasses magnesia that has been processed through fusion or sintering. This code is situated within Chapter 25, covering salt, sulfur, earths, and stone, rather than the chemical chapter, because it refers to mineral-based products. The classification includes fused magnesia, which is produced in electric arc furnaces to achieve high purity and crystal size, and dead-burned (sintered) magnesia, which is fired at extremely high temperatures to make it chemically inert for refractory use. The HS code 2519.90 is specifically for 'other' magnesium oxides that are not natural magnesium carbonate (magnesite). The determination for this code relies on the thermal treatment the mineral has undergone and its intended use in industrial applications like furnace linings or cement production.

Products Included

• Fused magnesia
• Dead-burned (sintered) magnesia
• Caustic calcined magnesia
• Heavy magnesium oxide
• Light magnesium oxide (non-pharmaceutical)

Common Misclassification

Magnesium oxide is often misclassified under HS code 2519.10, which is strictly for natural magnesium carbonate (magnesite). It is also frequently confused with HS code 2816.10, which covers magnesium hydroxide and peroxide. While 2816.10 is for chemically defined inorganic compounds, 2519.90 is for mineral-derived oxides. Furthermore, high-purity pharmaceutical grade magnesium oxide might sometimes be incorrectly placed in Chapter 30.

FAQ

What is the HS code for Magnesium oxide?

The standard HS code for processed magnesium oxide (fused or dead-burned) is 2519.90.

Is caustic calcined magnesia under the same code?

Yes, caustic calcined magnesia is generally classified under 2519.90 as it is a form of processed magnesium oxide.