Radnor, Pa.-based Airgas says its former law firm broke at least one of two Pennsylvania professional responsibility rules regarding conflicts when it dropped Airgas as a client in order to represent competitor Air Products & Chemicals in its attempted acquisition of Airgas.

The company said Cravath Swaine & Moore’s conduct involved two Pennsylvania-based companies and it is well within the purview of the state’s courts to monitor lawyer conduct within the state. Airgas wants Cravath enjoined from representing Air Products in its acquisition efforts as well as in ongoing litigation between Airgas and Air Products currently in Delaware’s Chancery Court.