Sodium hydroxide is not a flour base for kitchen use

Sodium hydroxide is not a face soda but a caustic soda.

Sodium decahydrate refers to the hydrate of sodium carbonate containing 10 crystalline waters. Also known as edible flour soda, it is the main ingredient of flour soda. It belongs to salt, not alkali.

White monoclinic crystals. Density. Melting point.

Heat until dehydration begins. Soluble in water, solubility in hot water is large, and some heat will be released. Insoluble in alcohol.

It quickly weathers in the air to form a white powder.

No, the flour alkali used in the kitchen is sodium carbonate.