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2931.90.90.52/Diethylphosphinic Acid/Mexico

Diethylphosphinic Acid from Mexico

Diethylphosphinic acid is an organophosphorus compound used as flame retardant in polymers. Classified in 2931.90.90.52 as organo-inorganic acid-function compound not covered by earlier P-specific headings.

Duty Rate — Mexico → United States

13.7%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Corrosive solid UN 3261; use fiber drums with polyethylene liner

• Flame retardant claims require UL certification for end-use validation

• Distinguish from phosphonic acids (2929.90) via P-C vs P-OH bonding

Diethylphosphinic Acid from Mexico — Import Duty Rate | HTS 2931.90.90.52