Food Safety Guide: Application, Safety and Compliance Requirements of Propionic Acid in Food Preservation

Propionic acid is a common organic acid food preservative, mainly used to inhibit mold growth, delay food spoilage and extend the shelf life of products. INS 280; In the EU food additive system, propionic acid corresponds to E 280, and sodium propionate, calcium propionate and potassium propionate correspond to E 281, E 282 and E 283 respectively.

For food enterprises and procurement teams, to judge whether propionic acid is safe, you can't just look at the raw material name, but also confirm at the same time:

• Whether it is a food-grade product;
• Whether it is used in food categories allowed by regulations;
• Whether the actual usage meets the requirements of the target market;
• Whether the product purity and impurities meet the corresponding standards;
• Whether the production process follows good manufacturing practices;
• Whether the label and additive declaration comply with local regulations.

Is Propionic Acid Food Safe?

In food categories permitted by regulations, adding food-grade propionic acid and propionates in accordance with the approved scope and level of use is generally considered to have no food safety issues.

The European Food Safety Authority re-evaluated propionic acid, sodium propionate, calcium propionate, and potassium propionate and concluded that when used in accordance with the uses and maximum levels already approved by the EU at that time, it would not pose a safety issue to consumers.

In the United States, propionic acid is listed in the 'Generally Recognized as Safe' substances for direct addition to food and can be used as an antibacterial agent and flavoring agent, but the amount used must not exceed the level required by current good manufacturing practice.

The Codex Alimentarius GSFA lists propionic acid as the preservative INS 280 and specifies good manufacturing practices or specific usage conditions for different food categories. This database has been updated to the 48th Codex Alimentarius Commission meeting held in 2025.

Therefore, 'propionic acid is safe' does not mean 'can be added infinitely', but means safe use under the conditions of complying with food regulations, product standards, and good manufacturing practices.

What is propionic acid?

Propionic acid, also known as propanoic acid, has the molecular formula C₃H₆O₂ and is a three-carbon organic carboxylic acid. The propionic acid and its salts in the food additive system mainly include:

The Food and Agriculture Organization of the United Nations has published the JECFA food additive specifications for propionic acid and confirmed that its international food additive number is INS 280.

Propionic acid can also occur naturally in some foods. The Food Safety Center of Hong Kong points out that propionic acid occurs naturally in certain cheeses and can also be used as a food preservative to control molds.

How does propionic acid exert its food preservation effect?

Moisture, nutrients, and suitable temperature in food may create conditions for the growth of molds, yeasts, and bacteria. The role of preservatives is to inhibit or slow down the growth of these microorganisms, thereby reducing the risk of food spoilage and extending the shelf life.

Propionic acid is a weak organic acid, and its preservation effect is related to food pH, water activity, formula composition, microbial types, storage temperature, and addition method.

Its main action process can be summarized as:

1. Propionic acid enters the food system and affects the local acidity environment;
2. The undissociated propionic acid acts on some microbial cells;
3. The energy required for microorganisms to maintain internal acid-base balance and normal metabolism increases;
4. The growth, reproduction of molds and the process of food spoilage are inhibited.

The Hong Kong Food Safety Center lists the main target microorganisms of propionic acid as molds and lists bread as a typical application food.

It should be noted that propionic acid does not have the same effect on all microorganisms, and it cannot replace food raw material control, thermal processing, hygiene management, hermetic packaging, cold chain and shelf life verification.

What is the safe addition concentration of propionic acid in food?

There is no uniform addition amount of propionic acid applicable to all countries and all products in food.

The allowable concentration usually depends on:

• Food category;
• Whether propionic acid or propionates are used;
• Purpose of use;
• Final pH and moisture of the product;
• Target sales country or region;
• Local food additive regulations;
• Whether the result is calculated based on propionic acid itself or based on salts.

Codex Alimentarius requirements

The Codex Alimentarius GSFA stipulates that some food categories are used in accordance with good manufacturing practices, and specific limits are set for other food categories.

For example, the Codex Alimentarius data shows that in some cheese standards, propionic acid, sodium propionate and calcium propionate can be used alone or in combination. Some regulations stipulate 3,000 milligrams per kilogram calculated as propionic acid; the relevant regulations for whey protein cheese are also 3,000 milligrams per kilogram. Different conditions may apply to different cheese categories and surface treatment uses.

This is just an example of regulations for specific food categories and cannot be directly applied to bread, beverages, meat products or other products.

U.S. requirements

U.S. regulations list propionic acid as an antimicrobial and flavoring agent that can be used under current good manufacturing practice. Calcium propionate can be used in baked goods, cheese, candies and frostings, gelatin puddings and fillings, jams and jellies, etc., in accordance with good manufacturing practice.

Sodium propionate is also involved in food categories such as non-alcoholic beverages, meat products, and gummy candies in U.S. regulations, but enterprises still need to confirm specific product classifications, purposes of use, and labeling requirements.

EU requirements

In the EU, propionic acid and its salts are managed as E 280—E 283 respectively. Whether food additives in the EU can be used and the specific conditions of use need to be confirmed according to the corresponding food categories and the EU food additive database.

The safety assessment conclusions of the European Food Safety Authority do not mean that these additives can be used in all foods, but that there are no consumer safety issues under the approved uses and amounts.

Hong Kong, China requirements

Hong Kong's current preservative regulation adopts a positive list management method combining food categories, permitted additives, and maximum permitted levels. Only preservatives permitted for the corresponding food category can be used in foods, and the maximum permitted level must not be exceeded.

Hong Kong regulations include propionic acid, as well as calcium propionate, sodium propionate, and potassium propionate, but the permitted uses and maximum limits vary by food category. Export enterprises should check the latest effective regulations before production and shipment and cannot solely rely on historical formulas.

What foods is propionic acid mainly used in?

1. Bread and baked goods

Bread, cakes, and other water-containing baked products may be contaminated with mold during storage and transportation. Propionic acid and propionates can be used to control mold growth and help extend the product shelf life.

The Food Safety Center of Hong Kong lists bread as a typical application scenario of propionic acid, and the Codex Alimentarius also includes baked goods in the scope of food categories related to propionic acid.

In actual product development, the following need to be considered simultaneously:

• Dough pH;
• Moisture content;
• Product sweetness and fat content;
• Packaging method;
• Contamination risk after baking;
• Transport temperature;
• Target shelf life;
• Impact on yeast fermentation and flavor.

2. Cheese and dairy products

Propionic acid naturally exists in some cheeses and can also be used as a preservative in certain cheeses or dairy products. The Codex Alimentarius lists different usage conditions for food categories such as mature cheese, processed cheese, whey protein cheese, etc.

Some cheese products only allow propionic acid to be used for surface treatment, so enterprises must distinguish:

• Added to the interior of the product;
• Used for cheese surface treatment;
• Used alone;
• Used in combination with propionates.

3. Grain and food storage

Propionic acid and its salts can be used for mold management in some grains and high-moisture raw materials, but food grains, animal feeds, and grain processing aids may be governed by different regulatory systems.

Food enterprises need to confirm that the use belongs to:

• Direct food additives;
• Food raw material processing;
• Processing aids;
• Warehouse mildew prevention treatment;
• Animal feed use.

Feed-grade propionic acid cannot be directly used as food-grade propionic acid.

4. Composite food and seasoning products

The propionic acid-related food categories in the Codex Alimentarius also involve some sauces, seasonings, fermented products, bean products, and special dietary foods, but the specific licensing conditions are not completely the same.

Food production enterprises should not default that a certain additive can be used in all composite foods in their country or target export market just because it exists in the Codex Alimentarius.

How to choose propionic acid, calcium propionate, and sodium propionate?

Propionic acid

Propionic acid is a liquid organic acid, suitable for production lines with liquid storage, metering, and dosing systems.

When selecting, key evaluations are required:

• Corrosiveness;
• Odor control;
• Tank and pipeline materials;
• Operator protection;
• Uniformity of addition;
• Finished product flavor.

Calcium propionate

Calcium propionate is a solid propionate, commonly found in baked goods and some cheese products. US regulations clearly list the various food categories in which calcium propionate can be used in accordance with good manufacturing practices.

When selecting calcium propionate, attention should be paid to calcium content, solubility, particle size, purity, and its impact on the formulation system.

Sodium propionate

Sodium propionate is also a common solid propionate. The food categories listed in US regulations include baked goods, non-alcoholic beverages, cheese, some candies, fillings, jams, and meat products, etc.

When selecting sodium propionate, it is also necessary to consider the overall sodium content of the product and the nutritional labeling requirements of the target market.

What are the differences between food-grade propionic acid and feed-grade propionic acid?

Although both food-grade and feed-grade products may have propionic acid as the main component, the applicable regulations, quality standards, impurity control, production systems, and usage declarations of the two may be different.

When purchasing food-grade propionic acid, suppliers should be required to provide:

• Food-grade product specification sheet;
• Corresponding batch COA;
• SDS safety data sheet;
• Product purity and moisture indicators;
• Heavy metal and related impurity information;
• Origin and production enterprise information;
• Batch traceability information;
• Packaging and storage conditions;
• Food safety documents required by the target market;
• Explanation of regulations applicable to the product.

Purchasers cannot determine that industrial-grade or feed-grade propionic acid can be used in food production solely based on "the same content"

Will propionic acid change the flavor of food?

Propionic acid itself has a relatively obvious odor. If the addition amount, dispersion method, or formula design is unreasonable, it may affect the odor and flavor of the product.

Therefore, food enterprises should determine through laboratory and pilot scale verification:

• Actual minimum effective usage amount;
• Sensory acceptance of finished products;
• Mold challenge test results;
• Normal temperature and accelerated shelf life;
• Stability after packaging is opened;
• Quality consistency of different batches.

Food preservation formulas should not only be based on the supplier's recommended amount, but also combine with the actual product for shelf life and microbiological verification.

How to establish a propionic acid preservation plan that meets food safety requirements?

Step 1: Confirm the target food category

Determine whether the product is bread, cake, cheese, condiments, grain products or other foods, and confirm whether propionic acid is allowed to be used in accordance with the regulations of the target market.

Step 2: Determine the form of the additive

Select according to production equipment and product formula:

• Liquid propionic acid;
• Calcium propionate;
• Sodium propionate;
• Potassium propionate;
• Composite organic acid preservation solution.

Step 3: Check regulatory limits

Need to confirm:

• Maximum permitted level;
• Calculated based on propionic acid or propionates;
• Used alone or in combination;
• Whether only surface treatment is allowed;
• Whether it is required to be used in accordance with good manufacturing practice;
• Whether the name or number should be used in the label.

Step 4: Conduct product verification

It is recommended to set up blank control group and test groups with different addition amounts, and detect:

• Molds and yeasts;
• Total number of colonies;
• Product pH;
• Water activity;
• Sensory changes;
• Shelf life;
• Packaging integrity.

Step 5: Establish traceability documents

Save raw material batches, addition amounts, production dates, test results, label versions, and supplier quality documents to respond to customer audits and regulatory inspections.

Jia Yijia Group Food-Grade Organic Acid Solutions

Jia Yijia Group focuses on organic acid technology and applications, providing organic acid and its salt products to food companies, food additive distributors, and international purchasing customers.

For propionic acid food preservation needs, we can assist in matching according to customers' product categories, target markets, packaging methods, and shelf life requirements:

• Food-grade propionic acid;
• Calcium propionate;
• Sodium propionate;
• Other organic acids and organic acid salts;
• Food preservation and anti-corrosion raw material solutions;
• Product specifications and batch quality information;
• Export trade and supply chain services.

In specific projects, it should be based on target country regulations, product testing, and customer final formula verification, and a single recommended addition amount cannot replace regulatory review and food safety assessment.

Frequently Asked Questions

Is propionic acid harmful to human body?

Adding food-grade propionic acid and propionates in accordance with the food categories and usage levels approved by regulations, the European Food Safety Authority believes that it will not pose a safety issue to consumers. If it exceeds the permitted scope, uses non-food-grade raw materials, or violates good manufacturing practices, the same conclusion cannot be drawn.

Can propionic acid be used in all foods?

No.

Whether propionic acid is allowed to be used depends on the regulations, food categories, purpose of use, and maximum permitted levels in the target country.

What microorganisms does propionic acid mainly inhibit?

Propionic acid is mainly used for mold control, and bread is one of its typical application scenarios. It cannot replace food safety control measures for all bacteria, yeasts, or pathogenic bacteria.

What is the safest amount of propionic acid to add to food?

There is no uniform number applicable to all foods.

First, query the regulations of the target market for the corresponding food category, and then determine the actual usage amount through microbial challenge tests, shelf life verification, and sensory tests.

What are the differences between calcium propionate and propionic acid?

Propionic acid is a liquid organic acid, and calcium propionate is a solid propionate. There are differences between them in equipment requirements, dispersion methods, formula impacts, and regulatory classification, and they cannot be simply replaced by the same weight.

Can food-grade propionic acid be used in feed?

Whether it can be used in feed needs to check the local feed additive regulations and product registration requirements. The food-grade standard does not automatically mean that the use in feed has been approved.

Conclusion

Propionic acid is a food organic acid preservative with a mature application foundation, mainly used for mold control and food shelf life management.

To judge the food safety of propionic acid, attention should be paid to food-grade quality, permitted food categories, regulatory limits, actual addition amount, label requirements, and shelf life verification.

For food enterprises and international buyers, reliable propionic acid supply not only means meeting purity requirements, but also requires complete COA, SDS, traceability information, regulatory compliance, and stable batch quality.