Key Takeaways
- E282 calcium propionate (INS 282, CAS 4075-81-4) is the EU E-number for the calcium salt of propionic acid, used as a mold inhibitor.
- JECFA set its acceptable daily intake as “not limited” in 1973 and reaffirmed this in 1997 – the highest safety tier a food additive can receive.
- Typical usage is 0.1%-0.3% of flour weight in baked goods, extending shelf life to 7-14 days without affecting yeast fermentation.
- It works best at near-neutral pH (6.0-7.5), making it ideal for bread, cakes, and cheese rather than acidic beverages.
- It is more specifically effective against molds than sodium benzoate (E211) or potassium sorbate (E202).
- The U.S. FDA lists calcium propionate as GRAS (GRN 786); EFSA’s 2014 re-evaluation found no safety concern at authorised use levels.
E282 Calcium Propionate vs. Other Preservatives 2026
How E282 calcium propionate compares with other common food preservatives on pH fit, target organism, and best-fit applications.
| Preservative | E-Number | Optimal pH | Primary Target | Best For |
| Calcium propionate | E282 (INS 282) | 6.0-7.5 | Molds | Bread, cakes, cheese, feed |
| Sodium propionate | E281 (INS 281) | 6.0-7.5 | Molds | Quick breads, no added calcium |
| Potassium sorbate | E202 (INS 202) | Below 6.5 | Yeasts & molds | Cheese, wine, acidic foods |
| Sodium benzoate | E211 (INS 211) | Below 4.5 | Bacteria & yeasts | Acidic sauces, drinks |
| Sodium diacetate | E262 (INS 262) | 4.5-5.5 | Molds | Bread, snack seasoning |
What Is E282 Calcium Propionate?
Behind every loaf of bread, pastry, and wheel of cheese on supermarket shelves sits an unsung guardian – calcium propionate. Known in the European Union by its food additive number E282 (and internationally as INS 282), this white crystalline powder plays an indispensable role in keeping food fresh, safe, and shelf-stable.
Chemical Identity and INS Number
E282 calcium propionate is the calcium salt of propionic acid (CAS 4075-81-4). It appears as a white crystalline powder, odorless or with a faint, mildly pungent smell. The “E282” label is the EU’s classification under food additive regulations; the equivalent international identifier INS 282 is used by the Codex Alimentarius and the Joint FAO/WHO Expert Committee on Food Additives (JECFA). For sourcing specifications and certificates of analysis, see the calcium propionate product page on the JustLong catalogue.
How the Body Processes It
Its most notable feature is its high safety profile. When consumed, E282 calcium propionate breaks down into propionic acid and calcium ions. Propionic acid is metabolised like any other fatty acid in the human body, while calcium is an essential nutrient. JECFA classified calcium propionate with an acceptable daily intake (ADI) of “not limited” in 1973 and reaffirmed that assessment at its forty-ninth meeting in 1997 – the safest tier a food additive can receive. The full JECFA evaluation of calcium propionate (INS 282) records this assessment.
How E282 Calcium Propionate Works Against Mold
The primary role of E282 calcium propionate is to inhibit the growth of molds and certain bacteria. Its mechanism is elegant and well understood.
The pH-Disruption Mechanism
Propionic acid molecules penetrate microbial cell membranes, release hydrogen ions inside the cell, and disrupt the organism’s internal pH balance. Unable to regulate that pH, the microorganism cannot grow or reproduce. Because the active species is the undissociated acid, E282 calcium propionate delivers propionic acid where it is needed without leaving a strong taste of its own.
Why It Excels in Baked Goods
Compared with common preservatives such as potassium sorbate (E202) or sodium benzoate (E211), E282 calcium propionate is more specifically effective against molds and performs best in neutral or slightly alkaline environments. This is exactly why it suits flour-based products – baked goods such as bread and cakes typically have a near-neutral pH of 6.0-7.5. A deeper look at calcium propionate applications in baking shows how this pH match translates into longer shelf life.
Main Applications of E282 Calcium Propionate
E282 calcium propionate earns its place across three major food and feed categories, each chosen because the product’s pH and mold-susceptibility profile match what the additive does best.
Baked Goods and Bread
Baked goods are the largest application. From sandwich loaves to baguettes, hamburger buns to mooncakes, E282 calcium propionate prevents mold growth during transport and storage, extending shelf life to 7-14 days without interfering with yeast fermentation. At a typical dose of 0.1%-0.3% of flour weight, it keeps bread fresh while leaving taste and texture untouched.
Cheese and Dairy
Cheese and dairy products draw a double benefit. E282 calcium propionate acts as a preservative and prevents cheese from softening or deforming at high temperatures. The characteristic holes and nutty flavor of some Swiss cheeses actually come from propionic acid produced during propionic-acid-bacteria fermentation – the same family of chemistry that makes E282 a reliable mold fighter. The broader advantages of calcium propionate in food extend well beyond bread alone.
Animal Feed
Animal feed is another major use. Corn and soybean meal are highly susceptible to mold growth during storage. Adding E282 calcium propionate protects feed quality, prevents mycotoxin-producing molds, and indirectly supports the health of farmed animals and the productivity of ruminants.
Safety and Dosage of E282 Calcium Propionate
E282 calcium propionate carries one of the cleanest safety records in the food additive shelf, backed by decades of regulatory review on three continents.
Regulatory Approvals
The U.S. FDA lists calcium propionate as Generally Recognized as Safe (GRAS, GRN 786); the European Food Safety Authority (EFSA) re-evaluated propionic acid and its salts in 2014 and concluded there is no safety concern at authorised use levels. In rare cases, sensitive individuals may experience mild gastrointestinal discomfort. The PubChem record for calcium propionate consolidates the FDA GRAS notice and JECFA summary in one place.
Typical Usage Levels
Its greatest practical advantage is effectiveness at low concentrations. E282 calcium propionate works at typically 0.1%-0.3% of product weight – far below the levels that could cause adverse effects in humans. For bread, that means roughly 1-3 grams per kilogram of flour, a margin that keeps the additive both effective and economical for manufacturers.
E282 Calcium Propionate and the Clean-Label Trend
Despite the growing “clean label” trend, where shoppers prefer shorter, recognisable ingredient lists, E282 calcium propionate remains a time-tested, well-researched classic preservative. Its high safety profile and irreplaceable antimicrobial effectiveness mean it will continue to serve as a “silent guardian” in the food industry. For manufacturers weighing E282 against alternatives, the decision comes down to pH fit and target organism – and on neutral-pH baked goods, few additives match it. Browse the full calcium propionate range or learn more about JustLong as a food-additive supplier.
Frequently Asked Questions
Answers to the most common questions buyers and bakers ask about E282 calcium propionate, from safety and dosage to how it compares with other preservatives.
What is calcium propionate?
E282 calcium propionate (INS 282) is the calcium salt of propionic acid, a white crystalline powder used as a food preservative. The “E282” number is the EU classification under food additive regulations, while INS 282 is the international Codex Alimentarius identifier. It inhibits molds in bread, cheese, and animal feed, extending shelf life without affecting taste or yeast fermentation.
Is calcium propionate safe to eat?
Yes. JECFA gave it an ADI of “not limited” in 1973, reaffirmed in 1997. The U.S. FDA lists it as GRAS, and EFSA’s 2014 re-evaluation found no safety concern at authorised levels. The body breaks it down into propionic acid, which is metabolised like a fatty acid, and calcium, an essential nutrient, so it leaves no harmful residue.
How does calcium propionate work as a preservative?
Propionic acid molecules penetrate microbial cell membranes and release hydrogen ions inside the cell, disrupting its pH balance. Unable to regulate internal pH, molds and certain bacteria cannot grow or reproduce. This makes E282 calcium propionate especially effective against molds in neutral-pH foods like bread and cakes.
How much calcium propionate is used in bread?
Typically 0.1%-0.3% of flour weight, roughly 1-3 grams per kilogram of flour. At this level E282 calcium propionate extends bread shelf life to 7-14 days by preventing surface mold, without interfering with yeast fermentation or altering the bread’s taste and texture.
Can calcium propionate replace sodium benzoate?
It depends on the product’s pH. E282 calcium propionate works best at near-neutral pH (6.0-7.5), making it ideal for baked goods and cheese. Sodium benzoate (E211) needs acidic conditions below pH 4.5, so it suits sauces and beverages. The two complement rather than replace each other across different food categories.
Is calcium propionate vegetarian or vegan?
Yes. E282 calcium propionate is produced synthetically from propionic acid and a calcium source, with no animal-derived ingredients. It is suitable for vegetarian, vegan, and halal food formulations, and is widely used in plant-based bakery and dairy alternatives.
What foods contain E282 calcium propionate?
It is most common in bread, buns, cakes, pastries, and mooncakes, where it prevents mold during storage. It also appears in cheese and dairy products, processed meats, and animal feed. Any commercially baked good with a shelf life of a week or more likely relies on E282 calcium propionate.
