Wiktionary
calcium formate
n. (context chemistry English) the calcium salt of formic acid; used in the scrubbing of flue gases, and as a food preservative
Wikipedia
Calcium formate
Calcium formate, Ca(HCO) (or. Ca(HCOO)), is the calcium salt of formic acid, HCOOH. It is also known as food additive E238 in food industry. The mineral form is very rare and called formicaite. It is known from a few boron deposits. It may be produced synthetically by reacting calcium oxide or calcium hydroxide with formic acid.