3,3'-Di(2,4,6-trichlorophenyl)-4,4'-diaminodiphenylmethane from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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