Propylene glycol is an organic compound with the chemical formula C3H8O2, which is miscible with water, ethanol and various organic solvents. Propylene glycol is a colorless viscous liquid under normal conditions, almost odorless and slightly sweet. The molecular weight was 76.09.
Propylene Glycol Properties and Stability
1. Flammable liquid. It is hygroscopic and does not corrode metal.
2. Toxicity and irritation are very small.
3. Exist in tobacco leaves and smoke.
Propylene Glycol Uses
Propylene glycol can be used as a humectant in combination with glycerin or sorbitol in cosmetics, toothpaste and soap. In hair dyes, it is used as a moisturizing and leveling agent, as an antifreeze, as well as in cellophane, plasticizer and pharmaceutical industr
(1) Propylene glycol is an important raw material for unsaturated polyesters, epoxy resins, polyurethane resins, plasticizers, and surfactants, and the amount used in this regard accounts for about 45% of the total consumption of propylene glycol. For surface coatings and reinforced plastics.
(2) Propylene glycol has good viscosity and hygroscopicity, and is widely used as hygroscopic agent, antifreeze agent, lubricant and solvent in the food, pharmaceutical and cosmetic industries.
(3) In the food industry, propylene glycol reacts with fatty acids to form propylene glycol fatty acid esters, which are mainly used as food emulsifiers; propylene glycol is an excellent solvent for condiments and pigments. Due to its low toxicity, it is used as a solvent for spices and food colorings in the food industry.
(4) Propylene glycol is commonly used in the pharmaceutical industry as a solvent, softener and excipient for the manufacture of various ointments, and as a solvent for blending agents, preservatives, ointments, vitamins, penicillin, etc. in the pharmaceutical industry.
(5) Because propylene glycol has good mutual solubility with various fragrances, it is also used as a solvent and softener for cosmetics, etc.
(6) Propylene glycol is also used as tobacco moisturizing agent, mildew inhibitor, lubricating oil for food processing equipment and solvent for food marking ink.
(7) Aqueous solutions of propylene glycol are effective antifreeze agents. Also used as tobacco wetting agent, mildew inhibitor, fruit ripening preservative, antifreeze and heat carrier, etc.
Post time: Oct-27-2022