Glycerin in the cosmetic: it does moisten or not?

The ease, with which the dream about the eternal youth and the beauty can become money, was understood at the end the 19th Century, when young cosmetic concerns began to let out volumetric tubes and jars. The great set of different components, traced on the label, nothing or almost nothing they tell buyer. One of the habitues of creams and lotions - chemical compound is glycerin, which is used in the cosmetic from the 19th Century. The impartial secret of glycerin, which raised question point-blank, was very recently opened: so it does moisten or not?

What is the glycerin?

Glycerin is one of the representatives of triatomic alcohols. Outwardly it is transparent, viscous and sweetish to the taste liquid. Originally in its cosmetology they began to use as the solvent, capable of ideally mixing the chemical constituents of cream into the uniform mass.

For the first time glycerin was obtained by Swedish scientific Carl Scheele at the end the 18th Century. Later Italian chemist Ascanio Sobrero derived the formula of trinitroglycerin - nitric acid ether, utilized as components for creating the explosives.

In the process of study were found three methods of obtaining the moistening substance:

        1)  The method, opened in 1811, is based on the production of the fatty acids, obtained from the fatty
             substances, subsequently processed by alkali with further decomposition of soap of sulfuric acid.

        2) The method, which they found somewhat later, in 1853. Its essence is reduced to the following: if we
            heat fats with the water, then under the action of pressure and constant mixing, fats are split, forming
            glycerin and fatty acids.

        3) They in 1938 invented one additional method of the production of glycerin. It is the synthesis of
            glycerin from propylene.

Depending on the quality of fats and designation clean glycerin is let out in the following markings:

       a) D -98, utilized for the softening of cloths in the textile industry, the skin in the leather dressing, the 
           production of paper, and also as by the component of the components of lubricants and antifreeze.

        b) PK -94, more high quality, the coming out as ingredient for the production in the cosmetic, food and
            pharmacological industry.