2930.90.26.00/4,4'-Thiodiphenol cyanate/Japan

4,4'-Thiodiphenol cyanate from Japan

Also known as 4,4'-thiodiphenol cyanate, this compound features a thioether linkage between two phenolic rings with cyanate groups, used in polymer synthesis and flame retardants. Named specifically in HTS 2930.90.26.00 as aromatic organo-sulfur compound per chapter 29 organo-sulfur definitions. The S-C aromatic bonds define its classification.

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

• Cyanate hazard declarations mandatory (UN2922); include flash point data

• Verify no isocyanate impurities that could shift to 2929

• Polymer manufacturers need specific CoA for molecular weight confirmation