The temperature dependence of the spontaneous polarization and the dielectric constant has been analyzed for the fixed pressures of 0.001,1 and 2.2 kbar close to the phase transitions in TSCC. This analysis is performed using the experimental data for TSCC according to a power-law formula. From our analysis, using the experimental data for the spontaneous polarization, we deduce the values of the critical exponent = 0.32 (1 bar), 0.28 (1 kbar) and 0.26 (2.2 kbar) for the spontaneous polarization near the transition temperatures of Tc = 129.6, 142.2 and 154.5 K, respectively in TSCC. We also deduce from our analysis using the experimental data for the dielectric constant, the value of nearly 1 of the critical exponent for the susceptibility above and below Tc under the three fixed pressures considered for TSCC. The values of and for the spontaneous polarization and the susceptibility which we deduce here, give an evidence for a second order transition between the paraelectric and ferroelectric phases in TSCC.