N-Butane To Replace Trichlorotrifluoroethane

According to proposal, trichlorotrifluoroethane replaced by n-butane as solvent for removal of oils, greases, hydraulic fluids, and other oily surface contaminants. N-butane candidate is replacement fluid because physical and chemical properties relevant to use as solvent similar to corresponding properties of trichlorotrifluoroethane. Considerably less expensive. Major disadvantage is flammability. As in cases of other hydrocarbon fluids, flammability hazard minimized by engineering controls.