Benzoic acid preservatives ua rau lawv cov molecules undissociated. Unresociated benzoic acid muaj zog lipophilicity thiab tuaj yeem nkag mus rau cov hlwb los ntawm cov cell membranes yooj yim, cuam tshuam nrog permeability ntawm microbial cell membranes xws li pwm thiab kab mob, cuam tshuam kev nqus ntawm cov amino acids los ntawm cov cell membranes. Benzoic acid molecules nkag mus rau cov hlwb acidify cov alkali khaws cia, inhibit qhov kev ua ntawm ua pa enzymes nyob rau hauv microbial hlwb, thiab yog li ua lub luag hauj lwm preservative.

Benzoic acid yog ib tug broad-spectrum antimicrobial neeg sawv cev uas muaj ib tug zoo ntxim rau cov poov xab, pwm, thiab ib co kab mob. Hauv qhov siab tshaj plaws ntawm kev siv, nws muaj kev cuam tshuam rau ntau yam kab mob ntawm pH qhov tseem ceeb hauv qab 4.5.

Sorbic acid thiab poov tshuaj sorbate muaj toxicity tsawg tshaj li benzoic acid, zoo preservative nyhuv tshaj sodium benzoate, thiab muaj kev nyab xeeb dua. Qhov zoo ntawm benzoic acid thiab sodium benzoate yog lawv qhov ruaj khov hauv huab cua thiab tus nqi qis. Tab sis nyob rau hauv lub xeev kaw, sorbic acid thiab poov tshuaj sorbate kuj ruaj khov, nrog rau cov poov tshuaj sorbate muaj thermal stability zoo thiab decomposition kub txog li 270 ℃. Vim qhov me me ntawm cov khoom noj khoom haus ntxiv, nws tsis ua rau tus nqi ntawm cov khoom noj nqaij. Yog li ntawd, ntau lub tebchaws tau maj mam siv sorbic acid thiab potassium sorbate los hloov benzoic acid thiab sodium benzoate.

Tsis tas li ntawd, benzoic acid muaj tsawg solubility nyob rau hauv acidic tej yam kev mob. Yog hais tias stirred unevenly, lub zos crystallization ntawm benzoic acid tej zaum yuav tshwm sim, ua rau ntau additives nyob rau hauv lub zos cov khoom. Benzoic acid kuj muaj kev cuam tshuam rau calcium chloride, thiab cov teebmeem zoo sib xws ntawm sodium chloride, isobutyric acid, gluconic acid, cysteine ??ntsev, thiab lwm yam. Ntxiv benzoic acid kuj tuaj yeem ua rau astringency hauv cov zaub mov thiab txawm cuam tshuam qhov tsw ntawm cov khoom noj nqaij. Yog li ntawd, nws tsis pom zoo kom siv benzoic acid thiab sodium benzoate ua preservatives hauv kev ua nqaij.

Qhov tseeb, ntxiv benzoic acid thiab sodium benzoate tsis yog ib txoj kev khaws cia rau cov khoom noj nqaij. Kev siv cov khoom siv ntuj tsim, xws li Nisin, chitosan, txuj lom extract, thiab lwm yam, kuj tuaj yeem ua tiav cov kab mob tua kab mob thiab khaws cia, uas kuj yog ib qho kev txhim kho ntawm kev lag luam nqaij. Kev khaws cia thiab khaws cia ntawm cov khoom noj nqaij kuj tuaj yeem ua tiav los ntawm kev txhim kho kev ua haujlwm, txhim kho cov ntim khoom noj, kev kho cua sov lossis irradiation sterilization ntawm cov khoom, thiab kev cia kub qis. Thaum kawg, qhov tseem ceeb tshaj plaws yog txhawm rau txhim kho kev tswj hwm kev nyiam huv thiab txo cov pa phem los ntawm qhov chaw