3-Carboxy-1-methylpyrazole from Mexico
3-Carboxy-1-methylpyrazole features an unfused pyrazole ring with carboxylic acid functionality, classified as aromatic pyrazole 'other' under HTS 2933.19.43.00. The acid function doesn't override pyrazole classification per Chapter 29 ester/acid rules. Common intermediate for herbicides.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Test for free acid vs salt form (salts follow base classification); provide pKa data if disputed; avoid packaging suggesting retail medicinal use