1. As a catalyst: Bis(acetonitrile)tetracarbonyltungsten is widely used in organometallic synthesis for the formation of carbenes and total carbenes, exhibiting significant catalytic activity. It can be used to catalyze the conversion of alkynes and alkenes, activation of C-H bonds, and other reactions. 2. As an intermediate: Bis(acetonitrile)tetracarbonyltungsten can serve as an intermediate in chemical synthesis, participating in the synthesis of other organic tungsten compounds.