High Purity Dibutyltin Oxide Catalyst from China
High purity grade (>99%) dibutyltin oxide used in esterification and transesterification reactions in fine chemical manufacturing. Classified under HTS 2931.90.90.21 as a specific organo-tin compound per the statistical suffix. Meets Chapter 29 requirements for chemically defined compounds with tin directly linked to carbon.
Duty Rate — China → United States
137.5%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0425%Except as provided in headings 9903.88.33, 9903.88.34, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(g) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(g)
Import Tips
• Provide detailed spectroscopic analysis (FTIR, NMR) confirming dibutyltin structure to support 2931 classification
• Check REACH/SVHC compliance; organo-tins are candidate substances requiring additional import notifications
• Ensure packaging prevents moisture absorption; degradation could lead to mixture classification under 3824