Urea-Thiourea Copolymer Resin from Germany
Copolymer where urea units predominate over thiourea (>95% combined per subheading note), used in paper impregnation. HTS 3909.10.00.00 covers as urea resin series with predominant monomer. Improves wet strength in specialty papers.
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
• Analyze comonomer ratio via NMR for customs; declare nitrogen/sulfur content indirectly verifying composition; avoid high humidity storage causing clumping