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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If precipitated magnesium oxide
Precipitated forms are synthetic chemicals under Chapter 28 exclusions.
If chemically treated as water disinfectant
Pesticides or disinfectants containing magnesium oxide shift to Chapter 38.
If dead-burned for high-temperature water applications
Dead-burned (sintered) magnesia for refractories uses specific 2520.20 subheading.
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Import Tips & Compliance
• Specify reactivity grade (e.g
• light-burned) in invoices to support 2519.90 classification
• Provide bulk packaging proof; retail packs may face different valuation
• Test for free lime content, common in reactive magnesia, to confirm specs
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.
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.
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.