2931.90.90.21/High Purity Dibutyltin Oxide Catalyst/Mexico

High Purity Dibutyltin Oxide Catalyst from Mexico

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 — Mexico → United States

3.7%

Rate breakdown

9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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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

High Purity Dibutyltin Oxide Catalyst from Mexico — Import Duty Rate | HTS 2931.90.90.21