Sodium Benzoate CAS NO.532-32-1
Name: Sodium Benzoate
CAS No.: 532-32-1
EINECS No:208-534-8
Appearance:White granules or crystalline powder
Molecular formula: C7H5NaO2
Molecular Weight: 144.1032
Density: 1.44 g/cm³
Melting point: 300℃
Boiling point: 249.3°C at 760 mmHg
Flash point: 111.4°C
Water solubility: soluble
Vapor Pressure: 0.0122mmHg at 25°C
Molecular structure:
Anticorrosion mechanism
Benzoic acid preservatives act on their undissociated molecules. Undissociated benzoic acid has strong lipophilicity and is easy to pass through the cell membrane and enter the cell, interfering with the permeability of the cell membrane of microorganisms such as molds and bacteria, and hindering the cell membrane's resistance to amino acids. Absorb and enter the benzoic acid molecules in the cell, acidify the alkali storage in the cell, inhibit the activity of the respiratory enzyme system in the microbial cell, and thus play a preservative role.
Benzoic acid is a broad-spectrum antimicrobial agent, which has a good effect on yeast, mold and some bacteria. It has an inhibitory effect on various bacteria within the maximum allowable use range and pH value below 4.5.