Abstract: A method for producing a magnetic recording medium, which comprises forming, by sputtering, a thin undercoating layer and a thin cobalt alloy magnetic layer sequentially on a substrate, wherein an intermediate electrode is provided in the vicinity of the target to enclose at least 1/2 of the circumference of the sputter erosion end of the target, and at least one of the undercoating layer and the cobalt alloy magnetic layer is formed under such condition that a positive potential relative to the substrate and the grounded portion of the main body of the layer-forming apparatus, is applied to the intermediate electrode.

Abstract: In the technology for producing 1,2-dichloroethane by reacting ethylene with chlorine by a liquid phase reaction at 65.degree. to 160.degree. C. in 1,2-dichloroethane containing a metal chloride catalyst, there is a disadvantage of a side reaction for producing 1,1,2-trichloroethane etc. at a large ratio to cause lower yield of 1,2-dichloroethane. The present invention is to overcome the disadvantage and to produce 1,2-dichloroethane in high yield by reducing the side reaction by incorporating at least one of aromatic compounds selected from the group consisting of benzene type hydrocarbons having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 respectively represent hydrogen atom, C.sub.1 -C.sub.5 alkyl group and chlorinated derivatives thereof as a side reaction inhibitor at a ratio of at least 0.001 wt. % in the reaction medium.