[Propylene glycol supply and procurement] List of uses of 1,2-propanediol and 1,3-propanediol

Propylene glycol is an organic compound (diol), usually slightly A sweet, odorless, colorless and transparent oily liquid that absorbs moisture and is easily mixed with water, acetone, and chloroform. Propylene glycol, which is widely used in various industries, is divided into two types: 1,2-propanediol and 1,3-propanediol.

The following suppliers of propylene glycol will give you a detailed introduction to the uses of the two:

1,2-Propanediol has good viscosity and hygroscopicity, and is non-toxic, so it is widely used as a hygroscopic agent, antifreeze, and lubricant in the food, pharmaceutical and cosmetics industries. agents and solvents. 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. Propylene glycol is commonly used in the pharmaceutical industry as a solvent, softener and excipient in the manufacture of various ointments and ointments. In the pharmaceutical industry, it is used as a solvent for blending agents, preservatives, ointments, vitamins, penicillins, etc. Because propylene glycol has good miscibility with various fragrances, it is also used as a solvent and softener in cosmetics. Propylene glycol is also used as a tobacco humidifier, antifungal agent, food processing equipment lubricant, and solvent for food marking ink. The aqueous solution of propylene glycol is an effective antifreeze agent and is often used as a substitute for ethanol and glycerol. It can be used as a wetting agent in toothpaste and cosmetics together with glycerin or sorbitol. It is also used as tobacco wetting agent, antifungal agent, fruit ripening preservative, antifreeze and heat carrier.

1,3-propylene glycol is a very important organic chemical raw material that can be used as a raw material for unsaturated polyester resin. 1,3-propylene glycol can be combined with terephthalic acid to synthesize polytrimethylene terephthalate (commonly known as PTT). Due to its excellent performance, PTT can make polyester plastics biodegradable with natural circulation. 1,3-propylene glycol is also a raw material for plasticizers, surfactants, emulsifiers and demulsifiers. It can be used as an antifungal agent, fruit ripening agent, preservative, antifreeze and tobacco moisturizer. It is often used as a raw material for polyester polyols, a starter for polyether polyols, and a polyurethane chain extender. In the organic chemical industry, it is also an important monomer and intermediate, and its main use is as a polymer monomer. body, synthetic polytrimethylene terephthalate (PrT).