High Purity 3-Methyl-5-Pyrazolone 99.5% from China
Ultra-high purity 3-Methyl-5-pyrazolone (99.5%) for advanced pharmaceutical synthesis is classified under HTS 2933.19.70.00. This specification confirms its status as a separate chemically defined organic compound with pyrazole ring per Chapter 29.
Duty Rate — China → United States
35%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Require third-party assay certificates for purity claims above 99%
• Ship under proper temperature control if melting point considerations apply
• Avoid water-dissolved forms unless meeting Chapter 29 note (d) transport criteria