How safe is to safely enter in the water no-man's land?

Ice crystallization observed in highly supercooled confined water

“…For water confined in smaller pores the suppression of crystallization would, allow confined water to remain in the deeply supercooled state below the homogeneous crystallization temperature of bulk water. This approach has been used to derive hints of the possible existence of a liquid-liquid phase transition in the no man's land of bulk water, provided that confined water can be assumed to be a realistic model for bulk water 21,22 . Whatever the nature of the surface of the porous matrix (polar, hydrophilic or hydrophobic), the restriction of the accessible space induced by confinement has indeed important structural, dynamical and thermodynamical consequences.…”

1H NMR Diffusion Studies of Water Self-Diffusion in Supercooled Aqueous Sodium Chloride Solutions

“…Thus, in principle, one can estimate properties of deeply supercooled water by analyses of asymptotic properties of salt solutions, which are extrapolated to the zero-concentration limit. This is an alternative method to studies of confined water, for example, in porous silica materials; however, the latter method requires taking into account water wetting the pore surface, which can have different properties than bulk water …”

“…This is an alternative method to studies of confined water, for example, in porous silica materials; however, the latter method requires taking into account water wetting the pore surface, which can have different properties than bulk water. 8 Studies of transport properties are valuable for examining the possible similarities between the influence of inorganic salts and pressure on water diffusion. The results of neutron diffraction experiments in aqueous sodium chloride solutions indicate that oxygen−oxygen radial distribution functions are strongly modified by the ions in a manner closely analogous to what happens in pure water under pressure.…”