Diphenyl Sulfone from Japan
Diphenyl sulfone (DPS) is a high-temperature solvent and polymer intermediate used in polysulfone production. HTS 2930.90.92.51 classification as other organo-sulfur sulfone. White crystalline solid with 250°C+ stability.
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%
Import Tips
• Melting point 124-126°C confirms engineering grade
• Low moisture (<0.1%) critical for polymerization applications
• Glass transition modifiers require additive disclosure