nt cat mb20 is a clear, colorless liquid with a mild odor. it is a bismuth-based gelling catalyst suitable for a wide range of polyurethane formulations. it does not contain 2-eha, dbt, or tbt.   physical and chemical properties <table class="msonormaltable ke-zeroborder” border=”0″ cellspacing=”2″ style=”width:431.2500pt;”> property value cas number 43-68007-3 molecular formula c14h22bio2 molecular weight...