Methyl 4,4,4-Trifluoro-3-oxobutanoate from Mexico
Methyl ester of 4,4,4-trifluoro-3-oxobutanoic acid, listed under HTS 2918.30.70.00 as a specific fluorinated keto-ester with carboxylic acid oxygen function and ketone group. Employed in fluorinated building blocks for medicinal chemistry.
Duty Rate — Mexico → United States
10%
Rate breakdown
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
• Verify against listed name exactly; synonyms like methyl trifluoroacetoacetate must reference CAS 348-58-3 for CBP verification
• Ensure no anti-dusting agents render it specific-use per note (g); standard lab packaging maintains chapter 29 status
• For sets with catalysts, classify individually unless integral per general rules; avoid bulk mixtures