2920.21.00.00/Dimethyl Phosphite (DMP)/Japan

Dimethyl Phosphite (DMP) from Japan

Dimethyl phosphite is a colorless liquid organophosphorus compound with the formula (CH3O)2P(O)H, classified under HTS 2920.21.00.00 as a phosphite ester of an inorganic acid of nonmetal (phosphorous acid). It serves as a key reagent in organic synthesis for producing phosphonate esters and flame retardants.

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

• Verify purity levels (>98%) via Certificate of Analysis to meet chemical import standards; ensure proper Hazard Communication labeling for corrosive properties; declare as pure compound to avoid mixture reclassification under Chapter 38