3,3'-Di(2,4,6-trichlorophenyl)-4,4'-diaminodiphenylmethane from China
Polychlorinated diarylmethane used in stabilizer-coupler systems for color films. Provides both color development and image permanence functions. Heavily substituted aromatic structure qualifies for duty-free photographic import.
Duty Rate — China → United States
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Chlorine content analysis confirms substitution pattern for tariff verification,Dark storage requirements prevent photodegradation during customs hold,Specific to silver halide color materials manufacturing processes