Sodium Benzoate
Sodium benzoate (E211), also called benzoate of soda, has chemical formula NaC6H5CO2.
It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid. Sodium benzoate is a preservative. It is bacteriostatic and fungistatic under acidic conditions. It is used most prevalently in acidic foods such as salad dressings (vinegar), carbonated drinks (carbonic acid), jams and fruit juices (citric acid), pickles (vinegar), and condiments. It is also found in alcohol-based mouthwash and silver polish. It can also be found in cough syrups like Robitussin.
Sodium benzoate is declared on a product label as 'sodium benzoate' or E211. For those who can taste the chemical, it tends to be perceived as sweet, sour, salty, or sometimes bitter.
  Synonyms Benzoic acid sodium salt, Sodium benzoic acid
  Molecular formula C6H5COONa
  Molecular weight 144.10
  CAS no. 532-32-1
  Appearance White crystalline or granular odourless powder
  Odour Sharp pungent smell
  Purity (by Chemical Analysis) 98.5% (Min.) (dry basis)
  Chloride content (As NaCl) 1.0% (Max.)
  Alkalinity (as Na2CO3) 0.5% (Max.)
  Solubility test (5% solu.) To comply the test
  Moisture 1.0% (Max.)
  Packing 50 kg in HDPE woven bags
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