It is widely used in various Propylene glycol in the industry is divided into two types: 1,2-propanediol and 1,3-propanediol. The propylene glycol commonly referred to in the market is 1,2-propanediol. Below, Shanghai, which supplies propylene glycol, will take you through the differences between the two.
1,2-Propanediol:
If there are no special requirements for propylene glycol on the market, it is generally 1,2-propylene glycol. The CAS identification number is 57-55-6. It is a chemical reagent that is miscible with water, ethanol and various organic solvents. Its chemical formula is: C3H8O2. Under normal conditions, it is a colorless, viscous liquid, almost odorless, and smells slightly sweet.
Can be used as a raw material for unsaturated polyester resin. It can be used as a wetting agent in combination with glycerin or sorbitol in cosmetics, toothpaste and soap. It is used as a moisturizing and leveling agent in hair dyes, as an antifreeze, and in cellophane, plasticizer and pharmaceutical industries.
1,3-Propanediol:
1 , 3-propanediol CAS identification number 504-63-2, and the molecular formula is C3H8O2. It is a colorless, odorless, salty, hygroscopic, viscous liquid that can undergo oxidation and esterification reactions, is miscible with water, and is miscible with ethanol and ether.
It is widely used as an organic solvent in industrial production. It can be used for the synthesis of a variety of drugs, new polyester PTT, pharmaceutical intermediates and new antioxidants. It is a raw material for the production of unsaturated polyester, plasticizers, surfactants, emulsifiers and demulsifiers; in the polyurethane industry, it is commonly used as a raw material for polyester polyols, a starter for polyether polyols and a polyurethane extender. Chain agent, etc.; in the organic chemical industry, it is also an important monomer and intermediate. Its main use is as a polymer monomer to synthesize polytrimethylene terephthalate (PrT).
Summary:
1,2-Propanediol It has a different structural formula from 1,3-propanediol;
1,2-propanediol is slightly sweet, while 1,3-propanediol is salty and hygroscopic.
1,2-propanediol and 1,3-propanediol have different uses.
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