Sodium benzoate is a white granule or crystalline powder organic matter with a slightly sweet taste and a relative molecular mass of 144.12. It is stable in air and easily soluble in water. Its aqueous solution has a pH value of 8 and is soluble in ethanol.
Benzoic acid and its salts are broad-spectrum antimicrobial agents, but their antimicrobial effectiveness is dependent on the pH of the food. As the acidity of the medium increases, its bactericidal and bacteriostatic effects are enhanced, but in alkaline media, the bactericidal and bacteriostatic effects are lost.
Mainly used as food preservatives, also used in the preparation of drugs, dyes, etc.
Store in a closed, cool, dry and ventilated place, and do not mix with toxic chemicals for transportation and storage.
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 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 inhibitory effect on various bacteria within the maximum allowable use range and pH value below 4.5.
|Assay (on dry basis)||99.0%-100.5%||99.0%-100.5%||99.0%-100.5%|
|Loss on drying (105℃，4h)||≤1.5%||≤1.5%||≤2%|
|Lead (as Pb)||≤10mg/kg||≤2mg/kg||≤10mg/kg|
|Chloride(CI)||≤0. 02%||—||≤0. 03%|
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