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2931.90.90.21/Dibutyltin Oxide (DBTO)/Germany

Dibutyltin Oxide (DBTO) from Germany

Dibutyltin oxide is a white, solid organo-tin compound used primarily as a catalyst in the production of polyurethanes and silicones. It falls under HTS 2931.90.90.21 as an organo-inorganic compound containing tin directly linked to carbon atoms, specifically classified within organo-tin compounds. This chemically defined compound meets Chapter 29 note (a) for separate organic compounds.

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

• Verify chemical purity and provide Certificate of Analysis (CoA) to confirm identity as dibutyltin oxide per Chapter 29 note (a)

• Include Safety Data Sheet (SDS) detailing toxicity; organo-tin compounds require EPA TSCA registration for US import

• Avoid misclassification as mixtures; ensure product meets 'separate chemically defined compound' criteria to prevent reclassification