Polypropylene Glycol

Other Trading Names:

  • PPG-3
  • PPG-17
  • PPG-7;ppg-15
  • PPG-12;PPG-16
  • PPG-20
  • PPG-26
  • PPG-34

CAS Number:  25322-69-4

HS Code: 3907.2000

Types of Packaging:

  • 25 Kg Drum
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Polypropylene Glycol

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99% - 99.99%

Melting point

-40 °C

Boiling point

>300 °C


1.01 g/mL at 20 °C

vapor density

>1 (vs air)

vapor pressure

<0.01 mm Hg ( 20 °C)

refractive index

n20/D 1.451


230 °C


H2O: <0.01 % (w/w) at 25 °C


Viscous Liquid


White to light gray

Specific Gravity


Water Solubility

Practically Insoluble


Stable. Substances to be avoided include strong oxidizing agents.

Chemical Description

  • Viscous colorless liquid (whose viscosity depends upon the average
  • Propylene glycol is used in the plastics industry for the manufacture of polyester fibers and alkyd resins.
  • It is used as a main ingredient in automobile antifreeze and engine-cooling liquids and in brake and hydraulic fluids. It is used as a humectant in foods and cosmetics. It is used as a solvent for coloring or flavoring agents as well as in many oral, injectable or topical pharmaceuticals.
  • Hydraulic fluids, rubber lubricants, antifoam agents, intermediates in urethane foams, adhesives, coatings, elastomers, plasticizers, paint formula- tions, laboratory reagents.
  • Colorless liquid that is odorless or has a mild sweet odor. May float or sink in water.
  • Poly(propylene glycol) is an alcohol. Flammable and/or toxic gasses are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. They react with oxoacids and carboxylic acids to form esters plus water.
  • Oxidizing agents convert them to aldehydes or ketones. Alcohols exhibit both weak acid and weak base behavior. They may initiate the polymerization of isocyanates and epoxides.
  • The compound has a very low toxicity; few, if any, symptoms will be observed. Contact of liquid with eyes causes slight transient pain and irritation similar to that caused by a mild soap.
  • Poison by intraperitoneal and intravenous routes.When heated to decomposition it emits acrid smoke and irritating fumes.
  • Store in a ventilated warehouse; keep away from sunshine; avoid fire; avoid moisture.Defoaming agent; Solvents for vegetable oils, waxes and resins. Used in eucalyptus, beverage, candy, yeast, etc
  • PPG has many properties in common with polyethylene glycol. The polymer is a liquid at room temperature. Solubility in water decreases rapidly with increasing molar mass.
  • Secondary hydroxyl groups in PPG are less reactive than primary hydroxyl groups in polyethylene glycol. PPG is less toxic than PEG, so biotech is now mainly produced with PPG.
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Polypropylene Glycol