Propylene Glycol

Propylene Glycol is an organic chemical. It is a very useful chemical substance which is industrially produced from propylene oxide. It is classified as a diol and its chemical formula is C3H8O2.

Chemical Appearance

Propylene Glycol has the appearance of a viscous and colourless liquid. It is nearly odourless and has a somewhat sweet taste. It is soluble in water, acetone, and chloroform.

Chemical Applications and Strengths

Propylene Glycol or Propane-1,2-Diol is an extremely useful chemical compound and therefore, has many industrial applications. Its main applications and strengths are:

• Propylene Glycol is most commonly used for the large-scale production of polymers. It is used as chemical raw material for the making of unsaturated polyester resins (UPR). It reacts with unsaturated maleic anhydride and isophthalic acid to form a copolymer.
• It is reacted with propylene oxide to make oligomers and polymers that are consumed for the production of widely used polyurethanes.
• It is useful in water-based acrylic architectural paints. It’s slow evaporation rate allows it to stop the surface from drying.
• It is approved for use indirectly as a food additive. It has the E-number E1520 for food applications. It is used in coffee-based drinks, liquid sweeteners, ice cream, and soda etc.
• It is widely used in cosmetics and pharmaceuticals. E490 is the number for cosmetic products and pharmacological products.
• It is applicable as a carrier or base for many types of makeup in the cosmetics industry.
• It is an ingredient of vaporisers used for pharmaceutical or personal care products delivery.
• It is consumed as a humectant in hand sanitisers to avoid the skin from drying.
• It is effectively utilised as a solvent and carrier for various insoluble pharmaceutical products.
• It is largely employed to de-ice aircrafts.
• It is used as a replacement of ethylene glycol in environment friendly automotive antifreeze.
• It is an essential ingredient of electronic cigarette liquids. It is used as both a carrier and for creating vapour in them.
• It is very effective in depressing freezing point in slurry ice.
• It possesses the ability of trapping and preserving insects.
• Fake smoke and fog are created using Propylene Glycol for dramatic effect.
• As an additive Propylene Glycol is expended in PCR to decrease the melting temperature of nucleic acids.

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