2931.43.00.00/Diethyl Ethylphosphonate/Japan

Diethyl Ethylphosphonate from Japan

Diethyl ethylphosphonate (DEEP) is a non-halogenated organo-phosphorus compound used primarily as a chemical intermediate in organic synthesis and flame retardant production. It falls under HTS 2931.43.00.00 as it is specifically named as a separate chemically defined organo-inorganic compound containing phosphorus directly linked to carbon. This colorless liquid is essential in manufacturing pesticides and plasticizers.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter

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Import Tips

• Provide detailed chemical analysis certificates confirming purity and structure to verify classification under 2931.43 as a specific organo-phosphorus compound

• Include Safety Data Sheets (SDS) and ensure proper UN packaging for flammable liquids (Class 3) to comply with DOT and customs requirements

• Avoid misclassification as pesticide preparations (3808) by importing as pure compound, not formulated product