Reaxis®  C716 - Bismuth Neodecanoate

REAXIS® C716 (Bismuth Neodecanoate) is one the most commonly used specialty metal-based catalysts for polyurethanes. With a long history of usage in a wide range of formulations, REAXIS® C716 is a suitable benchmark bismuth catalyst when either starting development work on new formulations or looking at using lower toxicity alternatives to organotins. Bismuth Neodecanoate is supplied with excess free neodecanoic acid to control viscosity. It can be supplied in a wide range of non-acid diluents including mineral oils, polyols, and esters. Other versions of our Bismuth Neodecanoate formulations include REAXIS® C3208 which has a higher Bismuth content, REAXIS® C3209 which combines higher bismuth content with reduced free acid, and REAXIS® C716LV which offers reduced viscosity. 

For more information, we invite you to read our technical bulletins on Novel Bismuth Complexes for Polyurethane Catalysis and Strategies for Improving Back-End Reactivity of Bismuth Carboxylate Catalysts.

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Technical Information

  • Product Category Bismuth

  • Chemical Name Bismuth Neodecanoate

  • CAS Number 34364-26-6

Typical Specifications

Parameter Range
Bismuth Content (%) 16.0 - 18.0
Color (Gardner Number) 5 Max
Density (g/ml) 1.05 - 1.15

International Regulatory Listings

  • TSCA (US) Yes

  • DSL (Canada) Yes

  • REACH (EU) Yes

  • AICS (Australia) Yes

  • KECI (South Korea) Yes

  • IECSC (China) Yes

  • TCSI (Taiwan) Yes

  • NZloC (New Zealand) Yes

  • PICCS (The Philippines) Yes

  • NDSL (Canada) No

  • ENCS (Japan) No


Like most bismuth carboxylates, REAXIS® C716 is commonly used in polyurethane applications,  including applications in adhesives and sealants, elastomers, foams, and coatings. REAXIS® C716 is used in applications where toxicity concerns with organotins are paramount. In addition to being used as a polyurethane catalyst, Bismuth Neodecanoate is used in lubricant formulations. 


REAXIS® C716 provides good overall reactivity.  In regard to polyurethane elastomers and foams, a good balanced cure is achievable given the presence of both a low metal content and large ligand. Thus, a balanced front-end/pot-life and back-end/ final cure reactivity profile can be achieved. Reactivity in costings, especially in regard to back-end cure, is greatly improved with the addition of added or exothermically generated heat.  Typical of the bismuth carboxylate family of catalysts, REAXIS® C716 will catalyze most polyurethane reactions and is similar in reactivity to tin-based catalysts, in that it is primarily selective toward the polyol-isocyanate and water-isocyanate reactions. REAXIS® C716 is hydrolytically stable within typical formulation moisture levels, but this stability will break down with increasing moisture content. In general bismuth carboxylates exhibit a lower hydrolytic stability compared to organotins. 

Package & Storage

  • 44 lb (20 kg) plastic pail
  • 440 lb (200 kg) steel drum
  • 2400 lb tote

REAXIS® C716 should be stored in the original packaging at moderate temperatures and kept from freezing. The container should be closed tightly after each use to maximize shelf life. Characteristic of most Bismuth Carboxylates, the primary cause of instability would be hydrolysis.

Safety and Handling

Before use of Reaxis products please refer to the relevant Safety Data Sheet (SDS) for safety and toxicological data as well as for the information on proper transportation, storage, and use. SDSs are available by request via our web site, contacting your local representative, or emailing direct to

Featured Technical Bulletins

This information is provided to the best of our knowledge but without obligation. Reaxis is not liable for any incorrect or missing information. This data sheet becomes invalid upon publication of a new version. Please contact us for the latest version.

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