Method for producing 2-chloro-1, 1-difluoroethane (HCFC-142), 1, 1, 2-trifluoroethane (HFC-143) and (E)-1, 2-difluoroethylene (HFO-1132 (E)) and/or (Z)-1, 2-difluoroethylene (HFO-1132 (Z))

Provided is a method for producing a target product HCFC-142 at a high yield and high efficiency while preventing the decomposition of raw materials such as HCC-140, HCO-1130, etc. The method for producing HCFC-142 comprises a step of bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to carry out one or more fluorination reactions, and a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride is obtained. 本发明提供一种防止原料HCC-140、HCO-1130等的分解且以高收率和高效率制造目标产物HCFC-142的方法。该HCFC-142的制造方法包括在稳定剂的存在下使含氯化合物与氟化氢接触来进行1种以上的氟化反应的工序，得到包含HCFC-142、氯化氢和氟化氢的反应气体。