Calcium chloride

Calcium chloride is an inorganic salt with several distinct functions in food processing. As a firming agent and acidity regulator (E509), it is added to canned tomatoes and vegetables to maintain crispness by cross-linking pectins in cell walls, used in cheese-making to ensure proper curd formation from pasteurised milk, added to sports beverages as a calcium source, and used in molecular gastronomy for spherification in combination with sodium alginate.

JECFA evaluated calcium chloride in 1975 and did not establish a numerical ADI, recognising it as a normal mineral salt whose calcium and chloride components are essential nutrients managed by standard metabolic pathways. The calcium it provides is nutritionally beneficial, particularly for bone health.

Calcium chloride is approved in the EU (E509), the United States (GRAS), Japan, and across all major food markets. Consumers will encounter it primarily in canned vegetables, where it helps preserved produce maintain an appealing texture, and in artisan cheeses, where it supports consistent curd formation. At the quantities used in food, it presents no safety concerns for the general population. It is also used medically as an electrolyte replacement, underscoring its established safety profile.