Tetrachloroethane, refractive index

For analysis of the samples, a physical method is often preferable to chemical methods. Chemical analysis nsually is appropriate only when a simple titration of each sample is involved, as in the case of the system HCI-H2O. If a physical property is chosen as the basis for an analytical method, it should be one that changes significantly and smoothly over the entire composition range to be studied. The refractive index is one property that can be used for the cyclohexanone-tetrachloroethane system. The values of are 1.4507 for cyclohexanone and 1.4942 for 1,1, 2,2 -tetrachloroethane, and log is almost a linear... 

TABLE 1 Logarithm of refractive index for cyclohexanone-tetrachloroethane mixtures... 

The compound consists of colorless crystals which melt at 35.7°. A supercooled melt shows a refractive index = 1.5313. The compound is very sensitive toward hydrolysis. It is readily soluble in benzene, nitrobenzene, and tetrachloroethane. 

---