Technical Grade Magnesium Oxide for Fertilizers
Technical magnesia powder used as a magnesium supplement in agricultural fertilizers. It qualifies under HTS 2519.90.50.00 as other magnesium oxide from natural sources, not chemically modified beyond calcination.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mixed with other fertilizer elements as a formulated product
Fertilizer mixtures containing magnesium oxide fall under Chapter 31, not pure mineral products.
If synthetic magnesium oxide for fertilizer
Chapter 28 covers synthetic oxides used in fertilizers, differentiated by production method.
If containing micaceous iron oxides or other Chapter 25 minerals
Mixed mineral products may classify under 2530 per chapter notes priority.
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Import Tips & Compliance
• Include soil amendment/fertilizer end-use statements, but classify based on material form, not use
• Document calcination process to prove it's 'other magnesium oxide' vs. fused types
• Avoid blending with NPK; pure magnesia imports stay in 2519—mixtures may shift to Chapter 31
Related Products under HTS 2519.90.50.00
Caustic Calcined Magnesia Powder
Caustic calcined magnesia is magnesium oxide produced by low-temperature calcination of magnesite, resulting in a reactive powder used in chemical and fertilizer industries. It falls under HTS 2519.90.50.00 as 'other magnesium oxide, whether or not pure,' distinct from fused or dead-burned varieties due to its calcination process and reactivity.
Pharmaceutical Grade Magnesium Oxide USP
Light magnesium oxide meeting USP standards for use as an antacid and laxative in pharmaceuticals. Classified under HTS 2519.90.50.00 as other magnesium oxide, provided it derives from natural sources and is not a finished medicament.
Reactive Magnesium Oxide for Water Treatment
Highly reactive light-burned magnesia used for pH adjustment and softening in water treatment plants. Falls under HTS 2519.90.50.00 as other magnesium oxide due to its natural origin and low-temperature processing.
Periclase Magnesium Oxide Crystals
Natural periclase crystals, consisting of nearly pure magnesium oxide, used in research and refractories. Classified in HTS 2519.90.50.00 as other magnesium oxide, whether or not pure, from mineral sources.
Animal Feed Grade Magnesium Oxide
Coarse magnesium oxide powder formulated for livestock mineral supplements to prevent grass tetany. HTS 2519.90.50.00 applies as other magnesium oxide suitable for feed but imported in bulk.
Dunite-Derived Magnesium Oxide
Magnesium oxide calcined from dunite rock (olivine), used in steelmaking and refractories. Classified under HTS 2519.90.50.00 as other magnesium oxide from natural mineral sources.