4-Acetyl-1-phenylpyrazole from Canada
4-Acetyl-1-phenylpyrazole contains an unfused pyrazole ring with aromatic ketone substitution, properly classified in HTS 2933.19.43.00. The pyrazole moiety determines classification over acetyl group per chapter note numerical order rules. Used in advanced materials synthesis.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include 1H-NMR spectrum confirming pyrazole proton shifts; declare acetyl as substituent not principal function; monitor for keto-enol tautomerism in COA