Why does tofu use gypsum as coagulant?

South tofu uses gypsum as coagulant, so it is also called "gypsum tofu". The chemical composition of gypsum is calcium sulfate, which has low solubility and slower solidification speed than brine. In the south, solidified things are called "tofu" or "tofu flower". The water content of tofu is higher than that of brine tofu, and the texture is more delicate.

Extended data

Two other ways to make tofu

1, brine tofu, using brine as coagulant, the main components are magnesium chloride, calcium chloride and calcium sulfate. When soybean milk is added to salt water, calcium and magnesium ions act quickly to solidify soybean milk. Salt water has a strong ability to condense protein. Water will seep out when it is put into the grinding tool, so the north tofu has high solid content and hard texture, which is also called "hard tofu". Because of the rapid solidification, the appearance is not uniform enough.

2. Lactone tofu uses something called "gluconolactone" as a coagulant, and some merchants use the Japanese name "silk tofu". Blood coagulation caused by gluconolactone is slow. Soymilk can be sterilized at ultra-high temperature, added with gluconolactone and then packaged and sealed. Lactone tofu has higher water content, and its texture is obviously smoother and more delicate than brine tofu and gypsum tofu.

People's Network-Tofu, the rougher it is, the more nutritious it is.

Baidu encyclopedia-tofu