Sodium benzoate is the sodium salt of benzoic acid has the chemical formula C7H5NaO2. Sodium benzoate is an antimicrobial preservative and flavoring used in the food industry and is a lubricant of tablets and capsules used in the pharmaceutical industry.
This substance is produced by neutralizing benzoic acid with caustic soda.
Sodium benzoate is specified on the product of the same name or E211.
Physical and chemical properties:
Sodium benzoate is a white, odorless crystalline compound that has a sweet taste and is soluble in water. Sodium benzoate has antimicrobial properties and is commonly used as a preservative in food products.
|Molar mass||144.105 g·mol−1|
|Appearance||the white or colorless crystalline powder|
|Taste||Sweetish, astringent taste|
|Melting Point||410 °C (770 °F; 683 K)|
|Boiling point||450 °C to 475 °C|
|Solubility in water||62.69 g/100 mL (0 °C)|
62.78 g/100 mL (15 °C)
62.87 g/100 mL (30 °C)
71.11 g/100 mL (100 °C)
|Solubility||soluble in liquid ammonia, pyridine|
|Solubility in methanol||8.22 g/100 g (15 °C)|
7.55 g/100 g (66.2 °C)
|Solubility in ethanol||2.3 g/100 g (25 °C)|
8.3 g/100 g (78 °C)
|Color||White, Colorless crystalline|
|Form||granules or crystalline powder|
|Chemical Structure Depiction|
E211, benzoate of soda, Sodium benzoic acid salt, antimol, mobanate and…
Formula and structure of sodium benzoate:
The above chemical composition is an organic sodium salt resulting from the replacement of the proton from the carboxy group of benzoic acid by a sodium ion.
Sodium benzoate production process:
There are two different ways to produce benzoic acid:
-In this process, toluene is oxidized by nitric acid, and eventually, benzoic acid is produced.
-Another way to produce this acid is to hydrolyze benzonitrile chloride and then add a mineral acid to it.
The most common way to convert benzoic acid to sodium benzoate is to add this acid to a solution of sodium hydroxide. The solution of this process contains Sodium Benzoate and water, which can be obtained by evaporation of the desired salt crystals.
Sodium benzoate is not naturally present, but benzoic acid is found in many plants, including cinnamon, tomatoes, berries, plums, and apples.
Applications and Uses of sodium benzoate:
-In the food industry: Sodium benzoate is a preservative also known as E211. Used in acidic foods such as salad dressings, carbonated beverages, jams and juices, pickles, condiments, and frozen yogurt additives.
Prevents the growth of harmful bacteria, mold, and other germs in food, thus preventing spoilage.
-In Pharmacy: It is used as a medicine for disorders of the urea excretion cycle. This is because of its ability to combine with amino acids. This ability in combination helps to excrete these amino acids and reduce the amount of ammonia.
Recent research suggests that sodium benzoate may be useful as a treatment for schizophrenia.
This combination with caffeine is used to treat headaches, shortness of breath due to a drug overdose.
-In cosmetics: Commonly used as a preservative in cosmetics such as hair products, baby wipes, toothpaste, and mouthwash. The reason for using preservatives in cosmetic products is that the growth of microorganisms in these products can cause unpleasant odors and colors.
–In industry: It has several industrial applications. One of its biggest uses is to prevent corrosion, such as car engine cooling or antifreeze.
Other applications include:
In fireworks, it is used as fuel in a whistle mix.
It can also be used as a stabilizer in photo processing
This compound can be used to improve the strength of some plastics.
Safety information of sodium benzoate:
In the United States, sodium benzoate is designated as generally recognized as safe (GRAS) by the Food and Drug Administration.
Possible health problems:
A small percentage of people may have allergic reactions such as itching and swelling after eating or using personal care products that contain sodium benzoate.
A research study shows that concomitant use of this preservative with food coloring increases hyperactivity in 3 years old children.
Despite its many benefits, sodium benzoate can also cause side effects such as nausea, vomiting, and abdominal pain.
Packing and storage:
Store in a tightly-closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.