High Purity Dibutyltin Oxide Catalyst
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied supported on carrier for catalytic use
If classified as other organo-tin compounds without specific dibutyltin oxide suffix
Broader organo-tin category applies if not meeting exact statistical reporting criteria for 2931.90.90.21.
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Import Tips & Compliance
• 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
Related Products under HTS 2931.90.90.21
Dibutyltin Oxide (DBTO)
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.
Dibutyltin Oxide Polyurethane Catalyst
Specialty dibutyltin oxide formulation optimized for polyurethane foam production, acting as gelling and blowing catalyst. Falls under HTS 2931.90.90.21 as the pure organo-tin compound before formulation into end-use mixtures. Excluded from Chapter 38 as it's a separate chemically defined compound per Chapter 29 note (a).
Technical Grade Dibutyltin Oxide
Technical grade dibutyltin oxide (95-98% purity) for industrial silicone curing applications. HTS 2931.90.90.21 classification applies to this organo-inorganic tin compound despite minor impurities, as it remains a separate chemically defined compound under Chapter 29 note (a).
Dibutyltin Oxide Silicone Crosslinker
Dibutyltin oxide serving as heat-activated crosslinker in RTV silicone sealants and adhesives. Classified in HTS 2931.90.90.21 as pure organo-tin compound, distinct from formulated sealant products. Direct tin-carbon bonds qualify it as organo-inorganic per Chapter 29 heading 2931 definition.