Michler's Ketone (4,4'-Bis(dimethylamino)benzophenone) from Japan
Michler's ketone is a diaryl ketone with two dimethylamino groups, widely used as a photosensitizer and dye intermediate. Falls under HTS 2918.30.2500 as an aromatic compound described in additional U.S. note 3 to section VI, emphasizing its ketone with oxygen-related functions in context.
Duty Rate — Japan → United States
21%
Rate breakdown
9903.04.628.5%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• CAS 90-94-8 verification essential; provide chromatograms showing >98% purity to avoid mixture classification
• Note potential CMR (carcinogen/mutagen/reprotoxic) status requiring special handling declarations