2930.90.92.25/Dimethyl Methylphosphonate (DMMP)/Mexico

Dimethyl Methylphosphonate (DMMP) from Mexico

Dimethyl methylphosphonate is an organophosphorus compound with the formula CH3P(O)(OCH3)2, containing a phosphorus atom bonded to one methyl group and two methoxy groups with no other carbon atoms directly attached to phosphorus. It falls under HTS 2930.90.9225 as it precisely matches the chemical structure specified for phosphorus compounds with one methyl group. Commonly used as a flame retardant and chemical intermediate.

Duty Rate — Mexico → United States

110%

Rate breakdown

9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter

9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter

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Import Tips

• Provide detailed chemical analysis certificates (CAS# 756-79-6) confirming the exact molecular structure to verify classification under 2930.90.9225

• Ensure SDS includes phosphorus bonding structure; misclassification as general organophosphorus (2931.00) is common without proof

• Declare purity levels accurately as impurities may trigger reclassification if exceeding chapter note tolerances