Description

Mono Propylene Glycol(PG) Pharmaceutical Grade for unsaturated polyester resins

 

Propylene glycol, also called 1,*-propanediol or propane*1,*-diol, is an organic compound (a diol or double alcohol) with formula C3H8O2. It is a colorless, nearly odorless, clear, viscous liquid with a faintly sweet taste, hygroscopic and miscible withwater, acetone, and chloroform.

The compound is sometimes called α-propylene glycol to distinguish it from the isomer propane*1,*-diol (β-propylene glycol).

 

Propylene glycol is a clear, colorless and hygroscopic liquid. Propylene glycol contains an asymmetrical carbon atom, so it exists in two stereoisomers. The commercial product is a racemic mixture. Pure optical isomers can be obtained by hydration of optically pure propylene oxide.

The freezing point of water is depressed when mixed with propylene glycol owing to the effects of dissolution of a solute in a solvent (freezing-point depression); in general, glycols are non-corrosive, have very low volatility and very low toxicity (however, ethylene glycol is toxic to humans and many animals).

Propylene glycol is considered generally recognized as safe (GRAS) by the U.S. Food and Drug Administration, and it is used as anhumectant (E***0), solvent, and preservative in food and for tobacco products, as well as being the major ingredient in the liquid used in electronic cigarettes. It is also used in pharmaceutical and personal care products.

 

Propylene glycol is a minor ingredient in the oil dispersant Corexit, used in great quantities during the Deepwater Horizon oil spill.

Application

 

Propylene glycol (PG C3H8O2 ) is a colorless liquid with steady viscosity and good water absorption. It is nearly odorless ,uninflammable and almost non-toxic. It can be mixed and solved with alcohol,water and various organic agents.

 

Propylene glycol  is the raw material for unsaturated polyester resin,plasticizer,surface active agent,emulsifying agent and demulsifying agent.It can also be used as mould inhibitor ,antiseptic for fruit ,ice inhibitor and moisture preserving agent for tobacco.