2931.90.90.21/High Purity Dibutyltin Oxide Catalyst/Germany

High Purity Dibutyltin Oxide Catalyst from Germany

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 — Germany → United States

10%

Rate breakdown

9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%

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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