"Brine Scientific name for salt brine, brine salt water boiled salt, the black liquid left is salt brine, is a mixture of magnesium chloride, magnesium sulfate and sodium chloride, due to the proteins can be coagulated into a colloid, so it is poisonous to the human body, drinking brine is the folk one of the main ways to commit suicide ^. ^. Brine is an important ingredient for making tofu, making the proteins in soymilk coagulate into a colloid and analyzing the water out to make tofu. Tofu made with brine is delicious.