Sorbic acid (chemical name: 2,4-hexadienoic acid molecular formula: C6H8O2)
Potassium sorbate (chemical name: potassium 2,4-hexadienoate) molecular formula: C6H7KO2)
Sorbic acid and potassium sorbate have similar properties and uses;
Sorbic acid is an efficient and safe preservative recommended by FAO and WHO. It is widely used in food, beverage, tobacco, pesticide, cosmetics and other industries. As an unsaturated acid, it can also be used in resin, perfume and rubber industries.
Anticorrosion
Sorbic acid (potassium) can effectively inhibit the activities of mold, yeast and aerobic bacteria, and also prevent Botox, Staphylococcus and Salmonella.
It is harmful to the growth and reproduction of microorganisms, but it is almost ineffective for beneficial microorganisms such as anaerobic Bacillus and Lactobacillus acidophilus, and its role in inhibiting development is better than sterilization.
It is stronger, so as to effectively prolong the storage time of food and maintain the flavor of the original food.
Its anti-corrosion effect is 5- 10 times that of the similar product sodium benzoate.
security
Because sorbic acid (potassium) is an unsaturated fatty acid (salt), it can be absorbed by the metabolic system of human body and quickly decomposed into carbon dioxide and
Water has no residue in the body.
ADI 0-25mg/kg (calculated by sorbic acid, FAO/WHO 1994)
LD50 4920mg/kg (rat, oral)
GRAS （FDA， 182.3640 1994)
Its toxicity is only 1/2 of salt and 1/40 of sodium benzoate.
stability
Sorbic acid (potassium) is stable in a sealed state, easily absorbs water when exposed to humid air, and oxidizes to change color. Potassium sorbate has good thermal stability and can be divided into two parts.
The decomposition temperature is as high as 270℃.
serviceable range
At present, it has been widely used in food, beverage, pickles, tobacco, medicine, cosmetics, agricultural products, feed and other industries. From the development trend, it should be
The scope of use is still expanding.
Sorbic acid (potassium) is an acidic preservative, which still has a good antiseptic effect in foods close to neutral (PH6.0-6.5), while benzoic acid (sodium) is antiseptic.
The effect is at PH> At 4 o'clock, the effect has obviously decreased, and it has a bad taste.
usage mode
When in use, you can use direct addition, spraying, dipping, dry powder spraying, processing on packaging materials and other ways to [return] pinyin B ě n ji m: su ā n à [return] English reference sodium benzoate[ return] Pharmacopoeia standard drug name Benjiasuanna English name SODIUM BENZOATE source (molecular formula) and standard product are calculated as dry products, and the content of C7H5NaO2 shall not be less than 99. Properties This product is white granule, powder or crystalline powder; No odor or slight odor, slightly sweet and salty.
This product is soluble in water and slightly soluble in ethanol. Check the pH value
Take this product 1.0g, add 20ml of water to dissolve it, and then add 2 drops of phenolphthalein indicator; If it is reddish, add 0.25ml of sulfuric acid titration solution (0.05mol/L), and the reddish color should disappear; If it is colorless, add 0.25ml of sodium hydroxide titration solution (0.1mol/L), which should be reddish.
drying shrinkage
Take this product and dry it to constant weight at 105℃, and the weight loss shall not exceed1.5% (Appendix VIII L).
Take 2.0g of this product for heavy metals, add 45ml of water, stir constantly, add 5ml of dilute hydrochloric acid dropwise, filter, divide 25ml of filtrate, and check according to the law (Appendix VIII H First Method). The content of heavy metals shall not exceed 10 parts per million.
Arsenic salt
Take anhydrous sodium carbonate 1g, spread it on the bottom and around the crucible, then take 0.4g of this product, put it on anhydrous sodium carbonate, moisten it with a little water, dry it, first burn it with a small fire to carbonize it, then ignite it at 500 ~ 600℃ to completely incinerate it, let it cool, add 5ml of hydrochloric acid and 23ml of water to dissolve it, and check it according to law (appendix ⅷ j first method). Identification: Take about 0.5g of this product, add water 10ml, and the solution shows the identification reaction between sodium salt (Appendix III) and benzoate salt (Appendix III). For content determination, take about 1.5g of this product, weigh it accurately, put it in a separatory funnel, add 25ml of water, 50ml of ether and 2 drops of methyl orange indicator, titrate it with hydrochloric acid titrant (0.5mol/L), and shake it with each drop until the water layer is orange red; Separate the water layer, put it in a conical flask with a stopper, wash the ether layer with 5ml of water, merge the washing liquid into the conical flask, add 20ml of ether, then titrate with hydrochloric acid titration solution (0.5mol/L), and shake it with the drop until the water layer shows a continuous orange-red. Every 1ml hydrochloric acid titration solution (0.5mol/L) is equivalent to 72.06mg of C7H5NaO2. Class antiseptic. Store tightly.