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E302 calcium ascorbate is the calcium salt of ascorbic acid (vitamin C), used as a food additive, antioxidant, and vitamin C source.
E302 calcium ascorbate is produced by neutralizing ascorbic acid with a calcium compound.
E302 calcium ascorbate consists of ascorbate ions bound to calcium ions, forming a stable mineral–vitamin complex.
CAS Number: 5743-27-1
Molecular Formula: C6H10CaO6
Molecular Weight: 218.22
EINECS Number: 227-261-5
Synonyms: CALCIUM ASCORBATE, 5743-27-1, ascorbic acid calcium salt, calcium diascorbate, calcium L-ascorbate, calcium L-ascorbate dihydrate, calcium ascorbate anhydrous, hemicalcium ascorbate, L-ascorbic acid calcium salt (2:1), E302, E-302, INS 302, INS-302, INCI calcium ascorbate, vitamin C (as calcium ascorbate), Ester-C, Calci-C, UNII-J96U0ZD4Y6, J96U0ZD4Y6, DTXSID40110036, EINECS 227-261-5, 227-261-5, CCRIS 7671, HSDB 255, CHEMBL2146095, SCHEMBL29384608, SCHEMBL29394722, RefChem:573386, ASCORBIC ACID CALCIUM SALT;CALCIUM ASCORBATE;calci-c;calcium diascorbate;L-Ascorbic acid, calcium salt (2:1);Calciumdiascorbat;XKHKUSZPZXOECF-JDYVBSGKSA-N;Calcium Ascorbate Granular
E302 calcium ascorbate structure preserves vitamin C activity while improving stability in food systems.
E302 calcium ascorbate also provides a small amount of calcium.
Physically, E302 calcium ascorbate appears as a white or slightly off-white crystalline powder.
E302 calcium ascorbate is water-soluble and has a mild or neutral taste.
E302 calcium ascorbate is odorless.
E302 calcium ascorbate provides antioxidant properties, helping prevent oxidation of fats, oils, and sensitive food components.
E302 calcium ascorbate protects against rancidity, discoloration, and flavor loss.
This improves shelf life.
E302 calcium ascorbate acts as a nutritional source of vitamin C, supporting normal immune and metabolic functions.
It contributes to collagen formation and antioxidant defense in the body.
This improves nutritional value.
E302 calcium ascorbate is less acidic than ascorbic acid, making it gentler on the stomach and reducing sour taste in foods.
This improves consumer acceptability.
E302 calcium ascorbate is suitable for sensitive formulations.
E302 calcium ascorbate is more stable in neutral and slightly alkaline conditions compared to pure vitamin C.
This reduces degradation during processing and storage.
This improves product stability.
E302 calcium ascorbate can also contribute a small amount of dietary calcium, depending on usage level.
This provides an additional nutritional benefit.
This enhances functional food value.
E302 calcium ascorbate is a stable, buffered form of vitamin C used as an antioxidant and nutrient fortifier in food, beverage, and supplement applications.
E302 calcium ascorbate is a neutral ascorbate, not irritating to the stomach.
It can provide about 10% of calcium that is very easily absorbed while supplementing with vitamin C.
E302 calcium ascorbate is anti-oxidative, anti-viral, anti-toxin, anti-allergic, immune-enhancing, and an important factor in the synthesis of collagen, the most important supporting tissue in the body, as well as the still controversial anti-cancer effect.
E302 calcium ascorbate is a calcium salt of ascorbic acid (Vitamin C) used as a food additive, antioxidant, and stabilizer to maintain freshness and prevent browning.
Known as "buffered vitamin C," it is less acidic than pure vitamin C, preventing unwanted sour tastes in products like processed fruits, meats, and beverages.
E302 calcium ascorbate also shows good processing stability during food manufacturing, including mixing, drying, and mild heating steps.
It retains more vitamin C activity than free ascorbic acid under the same conditions.
This improves production reliability.
E302 calcium ascorbate is widely used in instant beverage powders, where it maintains vitamin C content during long shelf storage.
It resists moisture-related degradation better than pure ascorbic acid.
This improves product longevity.
E302 calcium ascorbate is applied in cereal products and breakfast foods, where it can be used for vitamin C fortification.
It remains stable in dry matrices.
This improves nutritional enrichment.
In meat and processed meat products, it can act as an antioxidant to slow lipid oxidation.
E302 calcium ascorbate helps maintain color stability and freshness.
This improves product quality.
E302 calcium ascorbate is used in fruit preparations and jams, where it helps preserve color and reduce oxidation of natural pigments.
E302 calcium ascorbate supports overall product stability.
This improves visual quality.
E302 calcium ascorbate is applied in dairy and plant-based dairy alternatives, where it supports nutrient fortification.
It remains stable in neutral pH systems.
This improves formulation versatility.
It is commonly included in multivitamin and mineral supplements, where it provides both vitamin C and calcium in a single ingredient.
This simplifies formulation design.
This improves nutritional efficiency.
E302 calcium ascorbate can contribute to antioxidant protection in emulsions, helping stabilize oil-containing systems indirectly.
It works alongside other antioxidants in blended systems.
This improves overall stability.
Melting point: 192 °C
alpha: D20 +95.6° (c = 2.4)
Density: 1.21 g/cm3
form: crystalline powder
color: White
Odor: Odorless or almost odorless.
Cosmetics Ingredients Functions SKIN CONDITIONING
ANTIOXIDANT
Cosmetic Ingredient Review (CIR): Calcium diascorbate (5743-27-1)
LogP: -2.653 (est)
E302 calcium ascorbate is also used in cosmetic formulations, where vitamin C derivatives are included for antioxidant skin benefits.
E302 calcium ascorbate helps protect sensitive ingredients from oxidation.
This improves product stability.
E302 calcium ascorbate is a stable, multifunctional vitamin C derivative used for antioxidant protection and nutritional fortification in food, beverage, supplement, and cosmetic systems, valued for its stability, mild acidity, and calcium contribution.
E302 calcium ascorbate is involved in amino acid metabolism, synthesis of neurotransmitters, collagen and tissue interstitium.
It can supply an appropriate amount of vitamin C and calcium which can promote the body's nutrient metabolism and energy production, enhance immune function, improve vascular adaptability, improve the elasticity and tension of skin, blood vessels and other tissues.
In vivo, ascorbic acid and dehydroascorbic acid form a reversible redox system that plays an important role in biological oxidation and reduction processes and cellular respiration.
E302 calcium ascorbate also shows good compatibility with a wide range of food ingredients, including acids, sugars, proteins, and stabilizers.
This makes it easy to incorporate into complex formulations.
This improves formulation flexibility.
E302 calcium ascorbate has improved stability against oxidation compared to pure ascorbic acid, especially during storage in dry or mildly humid conditions.
This helps preserve vitamin C activity longer.
E302 calcium ascorbate is commonly used in dry food systems, such as powdered drinks, nutritional blends, and supplements.
It remains stable in low-moisture environments.
This improves product durability.
E302 calcium ascorbate performs well in fortified beverages, where it helps maintain vitamin C content over time.
It resists degradation better than free ascorbic acid in some conditions.
This improves nutritional stability.
It is used in processed foods, where heat or storage could degrade standard vitamin C.
It provides more stable antioxidant protection.
This improves processing resilience.
It can act as a synergistic antioxidant, working alongside tocopherols and other antioxidants.
This enhances overall protection against oxidation.
This improves formulation efficiency.
E302 calcium ascorbate has reduced sourness compared to ascorbic acid, improving taste in fortified foods and drinks.
This makes it easier to use at higher levels.
This improves sensory acceptance.
E302 calcium ascorbate is well tolerated in the digestive system, partly due to its buffered (less acidic) nature.
This reduces gastric irritation compared to pure vitamin C in some cases.
This improves user comfort.
E302 calcium ascorbate is used in nutritional supplements and tablets, where stability and calcium enrichment are desired.
It helps combine vitamin C and mineral fortification.
E302 calcium ascorbate is a stable, buffered vitamin C derivative with antioxidant activity, nutritional fortification properties, and improved stability and tolerability compared to pure ascorbic acid, widely used in food, beverage, and supplement applications.
Uses:
E302 calcium ascorbate is the salt of ascorbic acid which is a white to slightly yellow crystalline powder.
It is soluble in water and the ph of a 10% solution is 6.8–7.4.
E302 calcium ascorbate functions as an antioxidant and preservative.
E302 calcium ascorbate is widely used in the food industry as an antioxidant and vitamin C fortifier.
E302 calcium ascorbate helps prevent oxidation and improves nutritional value.
This extends shelf life and product quality.
In beverages, such as fruit juices, flavored drinks, and fortified waters, it is used to provide stable vitamin C.
E302 calcium ascorbate helps maintain vitamin content during storage.
This improves nutritional consistency.
E302 calcium ascorbate is applied in instant drink powders and nutritional mixes, where stability in dry form is important.
It resists degradation during long shelf life.
This improves product durability.
In processed foods, such as ready meals and packaged products, it helps prevent oxidation of fats and pigments.
E302 calcium ascorbate preserves color, flavor, and freshness.
This improves overall stability.
It is used in meat and poultry products, where it acts as an antioxidant.
It helps reduce lipid oxidation and color deterioration.
This improves product appearance and shelf life.
In fruit products, jams, and preserves, it helps protect natural colors and reduce vitamin C loss.
E302 calcium ascorbate slows oxidation of sensitive compounds.
This improves visual and nutritional quality.
E302 calcium ascorbate is used in dairy and plant-based dairy products, where it supports vitamin fortification.
It remains stable in neutral pH systems.
This improves formulation flexibility.
E302 calcium ascorbate is widely used in dietary supplements and multivitamin tablets, where it provides both vitamin C and calcium.
It simplifies nutrient formulation.
This improves functional nutrition.
In bakery and cereal products, it is used for fortification and antioxidant protection.
E302 calcium ascorbate helps maintain product freshness.
This improves shelf stability.
In cosmetic and personal care products, it may be used as an antioxidant ingredient.
E302 calcium ascorbate helps protect formulations containing oils and active compounds.
E302 calcium ascorbate is used wherever antioxidant protection, vitamin C fortification, and improved stability in food, beverage, supplement, and cosmetic applications are required.
E302 calcium ascorbate is also used in sports nutrition products, such as protein powders and recovery drinks.
It helps support antioxidant protection during intense physical activity.
This improves functional performance.
E302 calcium ascorbate is applied in infant and children’s fortified foods, where a mild, less acidic form of vitamin C is preferred.
It is gentler on the stomach compared to ascorbic acid.
This improves tolerability.
In emulsion-based foods, such as sauces, dressings, and spreads, it helps reduce oxidation of fats and oils.
E302 calcium ascorbate protects against rancidity at the interface of oil and water.
This improves product stability.
E302 calcium ascorbate is used in frozen foods, where it helps reduce oxidative degradation during long-term storage.
It maintains vitamin C activity even after freezing.
This improves nutritional retention.
In nut-based products, such as nut butters and snacks, it helps slow lipid oxidation.
E302 calcium ascorbate preserves flavor and prevents rancid notes.
This improves sensory quality.
E302 calcium ascorbate is applied in plant-based food alternatives, including vegan dairy and meat substitutes.
It supports nutrient fortification and antioxidant stability.
This improves product development.
E302 calcium ascorbate is used in fermented food products, where it can help stabilize vitamin content after processing.
It supports nutritional consistency.
This improves product reliability.
In functional beverages and wellness drinks, it is used as a stable vitamin C source.
E302 calcium ascorbate maintains activity during storage and distribution.
This improves health-oriented formulation.
E302 calcium ascorbate is also used in cosmetic and dermatological formulations, where vitamin C derivatives are included for antioxidant protection.
It helps stabilize sensitive ingredients.
E302 calcium ascorbate is used wherever stable vitamin C delivery, antioxidant protection, and mild acidity are required across food, beverage, supplement, and cosmetic applications.
Safety Profile:
When heated to decomposition it emits acrid smoke and irritating fumes.
E302 calcium ascorbate is generally regarded as a safe, low-toxicity food additive, widely used as a vitamin C source and antioxidant.
It is approved for use in food and supplements.
E302 calcium ascorbates safety profile is well established.
One possible effect is mild gastrointestinal discomfort at high intake levels.
This may include bloating or loose stools, similar to other vitamin C compounds.
These effects are usually dose-dependent.
Because it is less acidic than ascorbic acid, it is better tolerated in the stomach, but very high doses may still cause digestive upset.
This is mainly relevant for excessive supplement use.
Normal dietary intake is considered safe.
Allergic reactions are very rare, but sensitivity to vitamin C derivatives or calcium compounds may occur in susceptible individuals.
Symptoms are typically mild and uncommon.
Most people tolerate it well.
Excessive intake may contribute to temporary increases in urinary calcium, but this is generally not a concern at normal usage levels.
People with specific medical conditions should monitor intake.
