PC-21 Technical Data Sheet Appearance: White crystalline solid or clear liquid above -21oC Chemical composition: Hydrated sodium and calcium chlorides (min.90%) Density: 1.11 g/cm3 at -25oC (est.) Specific gravity: 1.17 at -10oC Melting point: -21oC Latent heat of fusion: 222 kJ/kg (isothermal max) Heat capacity (liquid): 3.20 kJ/kgoC Heat capacity (solid): 2.10 kJ/kgoC Thermal conductivity … Continue reading PC-21