2931.90.10.00/Phosphonous Acid Bis(2,4-di-tert-butylphenyl) Ester Derivative/Japan

Phosphonous Acid Bis(2,4-di-tert-butylphenyl) Ester Derivative from Japan

Technical-grade phosphonous acid derivative matching 4,4'-diphenylbisphosphonous acid di(2',2",4',4"-di-tert-butyl)phenyl ester specification, used in nylon and engineering plastics stabilization. HTS 2931.90.10.00 covers this exact aromatic organo-inorganic structure with direct P-C bonds.

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

• Label with GHS hazard pictograms and UN numbers for proper hazmat declaration

• Verify >99% assay via HPLC; lower purity risks 2931.90.90.00 or 3824 classification