Calcium Chloride
Also listed as E509.
PreservativesCAS: 10043-52-4
This is what the ingredient is.
Calcium chloride is an inorganic salt used as a firming agent, preservative, and electrolyte in foods.
Here is why it shows up on the label.
It works as a firming agent for fruits and vegetables, cheese-making aid, and canning additive.
Here is what food agencies say.
The FDA lists Calcium Chloride as Generally Recognized as Safe. Europe approves it as additive E509.
Here is what research has found.
Provides calcium. Essential for proper cheese texture. Long history of safe use in food.
Here are a few things worth knowing.
Generally well-tolerated at food-additive levels. May taste bitter if overused.
Sources
- FDA GRAS
- EFSA E509
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.
v1.0Updated 9/12/2026