Word Origin & History. critical 1580s, censorious, from critic + -al (1). Meaning pertaining to criticism is from 1741; medical sense is from c.1600; meaning of the nature of a crisis is from 1640s; that of crucial is from 1841.
Calcium citrate is the calcium salt of citric acid. It is commonly used as a food additive (E333), usually as a preservative, but sometimes for flavor.In this sense, it is similar to sodium citrate.alcium citrate is also found in some dietary calcium supplements (e.g. Citracal).
Sodium citrate has a surprisingly large number of different uses, given its relatively simple chemistry. Sodium Citrate most commonly appears as the salt trisodium citrate and can be used as an emulsifier, calcium sequestrant, acidity regulator, and preservative. In molecular gastronomy sodium citrate is widely used in spherification to regulate acidity and reduce calcium content to prevent early gelation. Sodium citrate is also used as an emulsifier to make constructed cheese, a smooth and melty cheese but with the flavor of aged cheese.