STH diethylene glycol for hromatogr. (3 ml)

STH diethylene glycol for hromatogr. (3 ml)

Diethylene glycol, two - ethylenic alcohol — chemical compound, the representative of biatomic alcohols.

Availability in molecule of diethylene glycol of two spirit groups leads to education inside - and intermolecular communications — with other substances containing electronegative atom (water, amines).

Diethylene glycol it is inclined to autooxidation. Autooxidation considerably accelerates in the presence of impurity of peroxide connections (peroxides, hydroperoxides) and is slowed down at addition of inhibitors (quinones, hydrochinones).

Diethylene glycol shows property both glycols, and esters. With carboxylic acids, their anhydrides and acid chlorides forms difficult mono - and diesters, with iketonama aldehydes in the presence of the catalyst — phosphoric acid — the corresponding cyclic acetals.

Dehydrogenation of diethylene glycol on the catalyst (copper, zinc - copper - chrome) brings to 1,4 - dioxane - 2 - onu. Dehydrogenation on alkaline catalysts gives 1,4 dioxane. At hydroxyethylation at 150 — 200 ° C in the presence of alkaline catalysts polyethyleneglycol is formed.

Diethylene glycol is transparent white viscous liquid. It is hygroscopic, possesses sweetish taste. Let's dissolve in water, the lowest alcohols, acetone, aniline, phenol and chloroform. Restrictedly we will dissolve in benzene, diethyl ether and tetrachloride carbon. Let's badly dissolve in mineral and vegetable oils.

Diethylene glycol is raw materials in industrial receiving esters, polyurethane, oligoefirakrilat. It serves as the plasticizer, effective extragent of aromatic substances in reforming processes. Diethylene glycol is used as dehumidifier of gases, as main component of antifreezes, pressure and hydrobrake fluids as solvent of nitrates of cellulose and polyester resins.