Comparing E526 - Calcium hydroxide vs E282 - calcium propionate
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Popular questions
Is calcium hydroxide a strong base?
Yes—calcium hydroxide (slaked lime) is a strong base; although only moderately soluble, its saturated solution (limewater) is highly alkaline (pH around 12.4).
What is calcium hydroxide used for?
In foods it’s used as an acidity regulator and firming agent—commonly for nixtamalizing corn (masa/tortillas), as pickling lime to keep cucumbers crisp, and in sugar refining; it’s also used to adjust brewing water pH.
Is calcium hydroxide bad for you?
At the small amounts used in foods it isn’t considered harmful and is permitted (e.g., FDA GRAS; EU E526) under good manufacturing practice. Concentrated powders or solutions are caustic and can burn or irritate skin, eyes, and the digestive tract.
Is calcium hydroxide safe to eat?
Yes, when food‑grade and used at normal levels it’s considered safe; residual amounts in treated foods are low and can contribute calcium. Avoid ingesting concentrated forms, which are corrosive.
How to make calcium hydroxide?
Industrial food‑grade calcium hydroxide is made by hydrating calcium oxide (quicklime), which is produced by calcining limestone; CaO + H2O → Ca(OH)2. For safety and purity, use commercially prepared food‑grade pickling lime rather than attempting to make it at home, as the reaction is caustic and highly exothermic.
Is calcium propionate bad for you?
No—at permitted food levels, calcium propionate (E282) is considered safe by regulators (FDA GRAS; EU-approved) and is rapidly metabolized. A small number of people may be sensitive, but evidence of harm at typical dietary exposures is limited.
What is calcium propionate made from?
It’s the calcium salt of propionic acid, usually produced by neutralizing propionic acid with calcium hydroxide or calcium carbonate. The propionic acid can come from petrochemical synthesis or fermentation by Propionibacterium.
Is calcium propionate banned in europe?
No—E282 is authorized in the EU as a preservative in specified foods under Regulation (EC) No 1333/2008, with set maximum levels. It is not permitted in foods for infants and young children.
What is calcium propionate used for?
It’s a preservative that inhibits molds and some bacteria to extend shelf life. In baking, it helps prevent mold and “rope” spoilage in bread and similar products.
What is calcium propionate used in?
Commonly in bread, rolls, tortillas, cakes, and other baked goods; it’s also permitted in some processed cheeses depending on the jurisdiction. Specific uses and limits vary by country and product category.