Sodium Benzoate

Sodium Benzoate

Sodium Benzoate is the sodium salt of benzoic acid having chemical formula C 6 H 5 COONa. It is an odourless crystalline powder. It does not occur naturally. It is obtained when benzoic acid reacts with sodium hydroxide. Sodium benzoate is a versatile chemical with preservative, medicinal, and other functions.

Industries Where Sodium Benzoate is mainly required :

  • Food and Beverages:
    It is widely used as a food additive. It is recognized as safe when used as intended as it is approved internationally. It inhibits the growth of harmful bacteria and other microbes in food. It’s particularly effective in acidic foods. Therefore, it’s commonly used in foods, such as soda, bottled lemon juice, pickles, jelly, salad dressing, soya sauce, and other condiments.
  • Medications:
    Sodium benzoate is used as a preservative in some over-the-counter and prescription medications, particularly in liquid medicines like cough syrup.
    It is used as a lubricant in pill manufacturing and makes tablets transparent and smooth, helping them break down rapidly after you swallow them.
    Larger amounts of sodium benzoate may be prescribed to treat elevated blood levels of ammonia.
  • Other Uses:
    It is commonly used as a preservative in cosmetics personal care items such as baby wipes, toothpaste, mouth wash and hair products.
    It also finds application in photo processing and to improve strengths of some type of plastic.

Properties of Sodium Benzoate of Gujarat Petrochemicals Limited.

Acidity or Alkalinity Not more than 0.2 ml of 0.1 M hydrochloric acid or 0.2 ml of 0.1 M sodium hydroxide is required to change the color of the solution. COMPLIES
Appearance of Solution

Solution is clear and not more intensely colored than reference solution.

Arsenic Maximum 2 ppm COMPLIES
Assay Not less than 99.0 % and not more than 100.5 % 99.80%
Chlorinated Compounds The filtrate complies with the limit test for chlorides. COMPLIES
Description A white, crystalline or granular powder or flakes, odorless or with faint odor hygroscopic. COMPLIES
Heavy Metals Maximum 20 ppm COMPLIES
Identification A. A white crystalline precipitate is produced. COMPLIES
Identification B.

Gives the reaction of sodium salts and reaction B and C of benzoates.

Loss on Drying Not more than 2.0% 0.40 %