6-Methyl uracil crystalline from Mexico
Crystalline form of 6-methyl uracil, explicitly named in HTS 2933.59.85.00 for pyrimidine compounds. Crystallinity represents physical state of the chemically defined organic compound. Utilized in nucleotide synthesis research.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.60100%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
• Document crystal structure (XRD data) if disputes arise on compound identity
• Ensure moisture content <1% to prevent classification as hydrated form
• For research use, avoid 'for retail sale' packaging per chapter exclusions