Propylene Glycol

Propylene glycol is used as an organic solvent and diluent in pharmaceuticals and many other industrial applications. Propylene Glycol (C3H8O2) is a propanediol that exists as a clear, colorless and hygroscopic liquid, consisting of propane where the hydrogens at positions 1 and 2 are substituted by hydroxyl groups.

Propylene Glycol is licensed under FSSAI (Category 99 - Substances added to food)

Industrial propylene glycol is used as a heat transfer medium, to control viscosity, to dissolve active agents or protect against corrosion and pressure burst. It is also used as raw material for the production of unsaturated polyester resins. By emulsifying active ingredients, which otherwise would not mix, propylene glycol helps to create a stable homogeneous fluid allowing for the intended final product, such as a face cream or shampoo to perform its function.

With its unique combination of properties propylene glycol supports many uses. It serves as a solvent; Connects and stabilises insoluble fluids (emulsifier); Helps to bind and transport other substances (excipient); Holds and dissolves active ingredients equally in a medium; Attracts/holds water/moisture (hygroscopic); Reduces freezing point, increases boiling point; Chemically inert.

Physicochemical Data

Properties Typical Value
Form Clear liquid
Appearance Colourless
Odour Odourless
Assay as Propylene Glycol  99.5% min.
Molecular Weight 76.05 gm/mol
Solubility Completely soluble in water

Application Areas

Liquid Detergent

  • Stabilizers
  • Enabling Agents

Aviation

Heat Transfer

  • De-Icing Fluid
  • Pipelines
  • Solar panel systems
  • Engines under extreme conditions
  • Marine transportation

Plastic Resins

  • Reinforced plastic laminates
  • Bath & kitchenware
  • Electrical components
  • Pipes and tanks sheet
  • Molding compounds
  • Blades for wind turbines

Paints & Coatings

  • Raw material in the production of alkyd resins for paints and varnishes
  • Freeze and thaw stability
  • Manufacturing printing inks, certain varnishes, paints or coatings
FSSAI - Chemtex Speciality Ltd