The use of benzoic acid
Benzoic acid with benzene or the that appears to smell of formaldehyde scaly or acicular crystal, with benzene or formaldehyde. Melting point 122.13 ℃, baking point is 249 ℃, the about body of 1.2659 ( 15/4 ℃). In 100 ℃rapidly developed, its breath has a able irritant, assimilation can advance to cough. Hardly acrid in water, acrid in ethanol, ether and added amoebic solvents. Benzoic acerbic is a anemic acid, blubbery acids stronger than. Their actinic backdrop similar, can anatomy a salt, ester, amide, anhydride, acyl halides, are not simple to be oxidized. Benzoic acerbic benzene ring can be electrophilic barter reaction, are meta-substituted product.
Benzoic acid is important acerbic blazon aliment preservative. Under acerb conditions, the mold, aggrandize and bacilli are inhibited, but the aftereffect was anemic acerbic - bearing bacteria. Inhibition of the optimum pH is 2.5～ 4, about beneath pH 4.5 ~ 5 appropriate. In the aliment industry with artificial bottled concentrated bake-apple and vegetable juice, the best bulk shall not beat 2.0g/kg; in a jam (not including canned ), bake-apple abstract (taste ), soy sauce, alkali cooler and best use of 1.0g/kg; in the gums, wine, bake-apple wine in the best use of 0.8g/kg; in low alkali pickled vegetables, sauce, candied fruit, best the use of 0.5g/kg; in a carbonated cooler and best use of 0.2g/kg. As a aftereffect of benzoic acid, hardly acrid in water, booze use can accomplish its dissolution.