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2931.90.90.21/Dibutyltin Oxide (DBTO)/Mexico

Dibutyltin Oxide (DBTO) from Mexico

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 — 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)
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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

Dibutyltin Oxide (DBTO) from Mexico — Import Duty Rate | HTS 2931.90.90.21