p-Tolyl Methyl Pyrazolone Crystals 99% Purity from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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