Effects of studies of phase equilibriums in binary systems perchloromethane - n-geptadecan and ethylene tetrachloride - n-geptadecan for which one performance of dots of nonvariant equilibriums are determined are resulted. Comparison counted on Schroder - Le-Shatele's method and experimentally found compositions of eutectics has demonstrated that deflection under the content polychlorinated derivative hydrocarbon doesn't exceed 2.7 percent. It testifies that the learnt systems are close to the ideal.
