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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

100%

Rate breakdown

9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)

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