  In the Higgs portal framework, the Higgs field generally mixes with the
Standard Model singlet leading to the existence of two states, one of which is
identified with the 125 GeV scalar observed at the LHC. In this work, we
analyse direct and indirect constraints on the second mass eigenstate and the
corresponding mixing angle. The existence of the additional scalar can be
beneficial as it can stabilise the otherwise-metastable electroweak vacuum. We
find parameter regions where all of the bounds, including the stability
constraints, are satisfied. We also study prospects for observing the decay of
the heavier state into a pair of the 125 GeV Higgs-like scalars.
