Glycerol has hygroscopicity and is often used as an additive in some skin care products to prevent dry skin. Its chemical formula (molecular formula) is C3H8O3. According to the relative molecular mass, it is the sum of the relative atomic masses of the atoms that make up the molecule, and it is analyzed and solved. The molecular weight of glycerol is12× 3+1× 8+16× 3 = 92.
The relative molecular mass refers to the sum of the relative atomic mass (ar) of each atom in the chemical formula, which is expressed by the symbol Mr and the unit is 1. For polymers, its relative molecular weight can reach tens of thousands or even hundreds of thousands; The chemical formula of the oxide with the smallest relative molecular mass is H? o .
Glycerol is a colorless, transparent, odorless, viscous liquid with sweet taste and hygroscopicity. It is miscible with water, alcohol, amine and phenol in any proportion, and the aqueous solution is neutral. Soluble in 1 1 times of ethyl acetate and about 500 times of ether.
Insoluble in benzene, chloroform, carbon tetrachloride, carbon disulfide, petroleum ether, oil and long-chain fatty alcohol. Flammable, can cause combustion and explosion in case of strong oxidants such as chromium dioxide and potassium chlorate. It is also a good solvent for many inorganic salts and gases. It is non-corrosive to metals and can be oxidized to acrolein when used as a solvent.
Storage method of glycerol:
1, stored in a clean and dry place, pay attention to sealed storage. Pay attention to moisture-proof, waterproof and heat-proof, and do not mix with strong oxidant. Can be stored in tin-plated or stainless steel containers.
2. Packed in aluminum drums or galvanized iron drums, or stored in storage tanks lined with phenolic resin. It should be moisture-proof, heat-proof and waterproof during storage and transportation. It is forbidden to put glycerol together with strong oxidants (such as nitric acid and potassium permanganate). According to the provisions of the general flammable chemicals storage and transportation.