Reaxis®  C3210 - Bismuth Octoate (Catalyst Grade)

REAXIS® C3210 (Bismuth Octoate) is a commonly used specialty metal-based bismuth catalyst for polyurethanes. With a long history of usage in a wide range of formulations, REAXIS® C3210 is a good benchmark catalyst when either starting development work on new formulations or looking at using lower-toxicity alternatives to organotins. REAXIS® C3210 has a higher bismuth metal concentration compared to REAXIS® C3208 (Bismuth Neodecanoate).   REAXIS® C3210 can be supplied with a wide range of non-acid diluents including mineral oils, polyols, and esters. Similar products include REAXIS® C716, REAXIS® C3208 and REAXIS® C3209. REAXIS® C3210 is present on most international regulatory lists, making it an ideal choice when developing global formulations. 

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.

Request A Sample Download The Technical Data Sheet

Technical Information

  • Product Category Bismuth Carboxylate

  • Chemical Name Bismuth Octoate (Catalyst Grade)

  • CAS Number 67874-71-9

Typical Specifications

Parameter Range
Bismuth Content (%) 26.5 - 28.5
Color (Gardner Number) 3 Max
Density (g/ml) 1.2 - 1.4

International Regulatory Listings

  • TSCA (US) Yes

  • DSL (Canada) Yes

  • AICS (Australia) Yes

  • KECI (South Korea) Yes

  • IECSC (China) Yes

  • ENCS (Japan) Yes

  • TCSI (Taiwan) Yes

  • NZloC (New Zealand) Yes

  • PICCS (The Philippines) Yes

  • NDSL (Canada) No

  • REACH (EU) No


Like most bismuth carboxylates, REAXIS® C3210 is commonly used in polyurethane applications. It is used in a wide range of polyurethane applications including coatings, adhesives and sealants, foams, plastics and elastomers. REAXIS® C3210 is used in applications where toxicity concerns are paramount. In addition to its use as a polyurethane catalyst, REAXIS® C3210 can be used in lubricant formulations.


The use of REAXIS® 3210 as a polyurethane catalyst results in good overall reactivity. A well-balanced cure is achievable, given the presence of both a low bismuth metal content and large ligand. Thus, a balanced front-end/pot-life and back-end/ final cure reactivity profile can be achieved. Reactivity, especially in regard to back-end cure, is greatly improved with the addition of added and exothermically generated heat. Typical of the bismuth carboxylate family of catalysts, REAXIS® C3210 will catalyze most polyurethanes reactions, and is somewhat similar in reactivity to tin-based catalysts; it is primarily selective toward the polyol-isocyanate and water-isocyanate reactions. REAXIS® C3210 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 (200kg) plastic drum

REAXIS® C3210 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.

Reaxis R Logo

Question About Our Products?

Are you unsure of what you are looking for? We want to hear your story. Maybe we can become a part of it.

Speak With An Expert