2933.99.24.00/4-(N-Ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine Sesquisulfate Monohydrate/Mexico
4-(N-Ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine Sesquisulfate Monohydrate from Mexico
Known as CD-3, this is the primary color developer for modern C-41 color negative processing. The sesquisulfate salt form provides optimal pH stability for high-volume photo labs. As an aromatic heterocyclic photographic chemical, it falls under HTS 2933.99.24.00.
Duty Rate — Mexico → United States
110%
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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify exact hydrate and salt stoichiometry; provide pH stability data; comply with sesquisulfate import specifications for consistent classification