2519.90.50.00/Hydrated Magnesium Oxide Powder/Japan

Hydrated Magnesium Oxide Powder from Japan

Partially hydrated form of magnesium oxide (MgO·H2O) used in rubber compounding and flame retardants. Still classified as magnesium oxide under HTS 2519.90.50.00 when from natural calcined sources.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• LOI (loss on ignition) tests prove hydration level but maintain MgO classification

• Avoid 'magnesium hydroxide' labeling; classify by chemical identity as oxide

• Specify natural vs. precipitated hydration process