Calcium Sulfate is also known as Terra Alba and another term used is gypsum. Calcium sulfate is a powder white food-grade ingredients that has a wide variety of uses.
It is used in distilling, brewing beer, and in baking. It has also has thickening properties that have been used in canned vegetables and preservatives.
In distilling and brewing the hydrated calcium sulfate is often a key to use to correct particular mineral deficiencies in water. It is used in de-mineralized, and soft water to increase the permanent hardness.Hydrated calcium Sulfate, also known as Gypsum is effective in eliminating variations in composition often encountered in water from surface sources. It will help establish proper pH of the mash and the wort and provide sufficient calcium ions essential for enzyme function and yeast metabolism.
Prepare a 1% solution of Brewers’ Gypsum in cold water in a separate tank with vigorous mixing. Calcium salts are more soluble in cold water, and the mixing will help dissolve the salt more completely. Dilute the Brewers’ Gypsum solution into water being heated for mashing or for sparging. The final concentration of salts should be in the range of 100 to 1000 ppm (mg/L). This will require 2.5 to 25 lb/Bbl (10 to 100 g/hl). If a tank is not available for making the solution ahead of time, the Brewers’ Gypsum can be added directly to mash water or sparge water with as much mixing as possible to assure dispersion.
Outside of consumables, calcium sulfate's thickening elements have also been known to be used in dental plaster and specialty cement.