4,4'-Thiodiphenol cyanate from Germany
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 — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
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