polyurethane triazine catalyst/jeffcat tr-90 overview: name: polyurethane hard foam catalyst polyurethane hard foam catalyst pc41 is a colorless to light yellow transparent liquid with a very faint odor or nearly odorless, easily soluble in water.pc-41 is a chemical substance with the molecular formula c18h42n6. catalyst pc-41 is a chemical substance, the molecular formula is c18h42n6....