p-Tolyl Methyl Pyrazolone Crystals 99% Purity from Mexico
High-purity crystalline form of 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-one, directly specified in HTS 2933.19.04.00 as an aromatic pyrazole derivative. Essential for azo dye coupling and analgesic synthesis. Classified here due to its unfused pyrazole ring and chapter precedence for latest numerical heading.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Test for crystal polymorphism to ensure consistent classification; provide melting point data
• Beware of REACH-like compliance for EU transshipments
• Store/import in inert atmosphere to prevent degradation