1-Hydroxy-N,N-diethyl-3-oxo-1H-indole-2-propanamide from China
An indolic coupler derivative used in photographic color development for fine-grain magenta dyes with controlled solubility. The heterocyclic amide structure ensures compatibility with aqueous processing. Classified under HTS 2933.99.24.00 for photographic use.
Duty Rate — China → United States
112.5%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Amide-function confirmation per heading provisions; provide solubility parameters; ensure coupler reactivity data for verification