**3.2 Thermal analysis**

Differential scanning calorimetry (DSC) is a frequently used technique for gaining thermal information such as enthalpy of melting and other melting data and is used for screening of co-crystals [22]. The type of solid formed can be identified from DSC thermogram. For example, a physical mixture has two endotherms indicating the melting points of components with no intermolecular forces between them [42], and a eutectic system has a particular endotherm having latent heat, not more than the corresponding components [43], while a co-crystal has a particular endotherm having latent heat lesser, higher, or in the middle of the parent components [44].
