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2832.20.00.00/Magnesium Sulfite Tribasic/Japan

Magnesium Sulfite Tribasic from Japan

Tribasic magnesium sulfite (Mg3(SO3)2) used in pharmaceutical buffering and flame retardants. Classified in HTS 2832.20.00.00 as a chemically defined sulfite salt of an inorganic base.

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

• GMP certification required for pharma grades; non-certified may face FDA detention

• Specify basicity level (tribasic); ambiguous descriptions lead to 2835 classification errors

• Monitor for asbestos contamination in natural-derived sources during inspections