Bismuth tris(2-ethylhexanoate)

Bismuth tris(2-ethylhexanoate) (CAS 67874-71-9) is an organo-bismuth compound used as a metal catalyst. Also marketed as Pucat 25, Neostann U 600, and KK 348.

Where is Bismuth tris(2-ethylhexanoate) used?

• Polyurethane and polymer formulations: non-tin, non-mercury alternative accelerating reactions
• Polyurethane systems: catalyzes the isocyanate-polyol reaction
• Drop-in replacement for organotin catalysts in foam, elastomer, and coating formulations where regulatory pressure limits tin use
• Sealants and adhesives: controls cure speed
• Industrial coatings: promotes cross-linking in moisture-cure and two-pack urethane topcoats on metal and wood
• Lubricants: precursor for bismuth-based extreme-pressure additive packages
• It manages open time in one- and two-component systems.

Good to know: Not to be confused with organotin catalysts; it is a non-tin, non-mercury alternative.

Commercial specifications

• Bismuth content characterizes standard commercial grades
• Viscous liquid, typically in solution with organic solvents
• Packaging: drums to IBCs for bulk industrial supply