Sodium benzoate CAS# 532-32-1

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Chemical Name: Sodium benzoate
CAS No.: 532-32-1
Molecular Fomula: C7H5NaO2
Molecular weight: 144.10317
Appearance: White Crystals, Granules, Flakes or Crystalline Powder
Sample: Available

Sodium benzoate CAS# 532-32-1

Description of Sodium benzoate

Sodium benzoate is a substance which has the chemical formula NaC7H5O2. It is a widely used food preservative, with an E number of E211. 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.

Basic Info of Sodium benzoate

Chemical NameSodium benzoate
CAS No.532-32-1
Molecular FormulaC7H5NaO2
Molecular Weight144.10300
Safety StatementsS24/25
HS Code4002191900
WGK Germany1
Risk StatementsR36/37/38
Hazard CodesXi
Caution StatementP305 + P351 + P338
Hazard DeclarationH319
Signal WordWarning
Appearance & Physical StateWhite crystalline powder.
Density1.44 g/cm3
Boiling Point249.3ºC at 760 mmHg
Melting Point>300ºC(lit.)
Flash Point111.4ºC
Water Solubilitysoluble
StabilityStable, but may be moisture senstive. Incompatible with strong oxidizing agents, alkalis, mineral acids.
Storage ConditionStore at RT.
MDL numberMFCD00012463
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What is Sodium benzoate?

  • With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Ucephan which has developed particularly rapidly in recent years. Do you know about Ucephan?
  • The official answer: Sodium benzoate, also known as sodium benzoate, is an organic substance with the chemical formula C7H5NaO2, a white granular or crystalline powder, odourless or with a slight benzoin odour, slightly sweet, astringent, with a relative molecular mass of 144.12, stable in air, easily soluble in water, its aqueous solution has a pH value of 8, and soluble in ethanol. Benzoic acid and its salts are broad-spectrum anti-microbial reagents, but its antimicrobial effectiveness depends on the pH value of the food.
  • As the acidity of the medium increases, its bactericidal and antibacterial effectiveness is enhanced, and it loses its bactericidal and antibacterial effect in an alkaline medium. The optimum pH value of antiseptic is 2.5~4.0.

What’s the application of Sodium benzoate?

Sodium benzoate is also an important acid-based food preservative. It is converted to the active form of benzoic acid when used. See benzoic acid for the range of use and the amount used. It can also be used as a preservative for feedstuffs. It is used as a food additive (preservative), a fungicide in the pharmaceutical industry, a mordant in the dye industry, a plasticizer in the plastic industry, and an intermediate in organic synthesis such as fragrances.


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