Description
A) benzoic acid and sodium salt is a common food preservative, have
prevent metamorphic sour, extend shelf life effect, in all
countries of the world are widely used.
B) At room temperature, benzoic acid soluble in water, in the air
(especially hot air) in the volatile, has hygroscopic, under normal
temperature, about 0.*4g/**0 ml; But soluble in hot water; also
soluble in alcohol, chloroform and the volatile oil. In use many
choose sodium benzoate; Benzoate mostly for the white particles,
odourless or microstrip rest scent smell and taste sweet,
convergence; Soluble in water (room temperature) *3.0g/**0
ml ,PH in 8;Sodium benzoate is acidic preservative,
in alkaline medium without sterilization, bacteriostatic action;
Its anticorrosion best PH is 2.***4.0, when 5% of the
solution in PH5.0 bactericidal effect also is not very good. Sodium
benzoate lipophilic bigger, easy to pass through the cell
membranes into the cell body, interference of the cell membrane per
meability, inhibit the absorption of cell membrane of amino acid;
Into the cells in the body of the cell ionization acidification
alkali store, and inhibie the cells of the department of breathing
enzyme activity, stop acetyl coa A condensation reaction, thus
plays food antiseptic purpose.
