Introduction: In our daily life, we buy vacuum-packed food in the supermarket, we can see a bag of antioxidants in the package, which can slow down the deterioration of food, to prevent the food from being oxidized too quickly with chemical agents. If the shelf life of the food is too short, it will cause great losses to the business, and the use of antioxidants can make the business loss is minimized, but also let consumers use more assured. What are antioxidants? In this article, I will give you a little bit of science.

One, the main antioxidant

Hindered phenol and hindered amine are the two main antioxidants. Most of the hindered phenol antioxidant is not discolored, suitable for white or light-colored products. Hindered amines are not only colorful but also turn darker under the action of oxygen and light. The main antioxidants commonly used in plastics are described below.

(1)2,6 Di-tert-butyl-p-cresol (also known as BHT or antioxidant 264), white crystal, yellow when exposed to light, non-toxic, soluble in benzene, ketones, alcohols, gasoline, carbon tetrachloride and insoluble in water.

(2)β(3,5 di-tert-butyl-4-hydroxyphenyl)propionic acid octadecyl alcohol ester (also known as antioxidant 1076), white powder, melting point 119-123 ° C, odorless, slightly poisonous, heat and water extractive, soluble in benzene, acetone, chloroform, insoluble in water, and polymer It has good compatibility with polymer and other additives, and is stable during transportation.

(3)1,1,3 tris(2-methyl-4hydroxy-5-tert-butylphenyl)butane(also known as antioxidant CA), soluble in ether, ethyl acetate, not allowed to water.

(4)1,3,5 Trimethyl 2,4,6 tris(3,5 di-tert-butyl-4 hydroxybenzyl)benzene (also known as antioxidant 330), white crystalline powder, melting point of 200 ° C or more, soluble in benzene, dichloroethane, slightly soluble in alcohol, insoluble in water. Insoluble in water.

(5)2,2'-Methylenebis(4-ethyl-6-tert-butylphenol)(MEB for short), white powder, soluble in benzene, acetone, insoluble in water.

Two, auxiliary antioxidants

Phosphite, thiodipropionate and thiols are typical auxiliary antioxidants, commonly used:

(1) tris (nonylidene phenyl) phosphite (referred to as TNP), amber viscous liquid, soluble in acetone, ethanol, benzene, carbon tetrachloride, insoluble in water, odorless, tasteless, non-toxic.

(2)Tris(2,4-di-tert-butylphenyl) phosphite (TBP for short).

(3) Dioctadecyl diphosphite pentaerythritol ester (abbreviated DPD).

(4) Tetrakis(2,4-di-tert-butylphenyl)4,4'-biphenyl propyl diphosphate.

(5)Dilauroyl thiodipropionate (DLTDP for short), white flocculent crystalline solid, melting point 38-40 ℃, low toxicity, carbon tetrachloride, petroleum ether, insoluble in water.

We will see a lot of food is vacuum-packed when we visit the supermarket, this kind of food can be stored for a long time, will not be oxidized and deteriorate quickly because of exposure to air. Individually packaged vacuum bag we can see a small bag of antioxidant, is this small package of things, so that food is not easy to deteriorate, so that consumers can eat more assured. There are many kinds of common antioxidants, this article from the main antioxidant and auxiliary antioxidant two categories to give you an introduction, I hope you have a better understanding.

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