What is the sea salt in the bible?

The dead sea is commonly referenced the Bible when discussing borders around the land of Israel. Various name used to refer to it in the Bible includes 'Sea of Arabah', 'Eastern Sea' and 'salt sea'. Some Bible researchers say that it was around this dead sea David hid when King Saul was looking for him, and it was around the dead sea that Lot's wife turned to a pillar of salt.