6-Nitrobenzimidazole from Mexico
Used as a desensitizer and antifoggant in photographic emulsions, particularly for X-ray films requiring high contrast. This nitro-aromatic heterocycle controls silver halide sensitivity. Its specific photographic function qualifies it for 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
• Nitroaromatic requires explosive precursor screening; provide X-ray film end-use verification; ensure proper sequencing in Chapter 29 classification hierarchy