Automotive/Engineering

Monopropylene Glycol Organic Compound Antifreeze Aircraft De-Icing Fluid – 210L

Propylene glycol is an organic compound with the chemical formula

CH3CH(OH)CH2OH. It is a viscous, colorless liquid, which is nearly

odorless but possesses a faintly sweet taste. Containing two alcohol

groups, it is classed as a diol. It is miscible with a broad range of

solvents, including water, acetone, and chloroform. In general,

glycols are non-irritating, have very low volatility and very low

toxicity.

Propylene glycol is commonly used to de-ice aircraft

Antifreeze

The freezing point of water is depressed when mixed with propylene

glycol. It is used as aircraft de-icing fluid. Water-propylene glycol

mixtures dyed pink to indicate the mixture is relatively nontoxic are

sold under the name of RV or marine antifreeze. Propylene glycol is

frequently used as a substitute for ethylene glycol in low toxicity,

environmentally friendly automotive antifreeze. It is also used to

winterize the plumbing systems in vacant structures. The eutectic

composition/temperature is 60:40 propylene glycol:water/-60 °C.

The −50 °F/−45 °C commercial product is, however, water rich; a

typical formulation is 40:60.

Polymers

Forty-five percent of propylene glycol produced is used as chemical

feedstock for the production of unsaturated polyester resins. In this

regard, propylene glycol reacts with a mixture of unsaturated maleic

anhydride and isophthalic acid to give a copolymer. This partially

unsaturated polymer undergoes further crosslinking to yield

thermoset plastics. Related to this application, propylene glycol

reacts with propylene oxide to give oligomers and polymers that are

used to produce polyurethanes. Propylene glycol is used in

waterbased acrylic architectural paints to extend dry time which it

accomplishes by preventing the surface from drying due to its slower

evaporation rate compared to water.

Food

Propylene glycol is also used in various edible items such as coffee

based drinks, liquid sweeteners, ice cream, whipped dairy products

and soda. Vaporizers used for delivery of pharmaceuticals or

personal-care products often include propylene glycol among the

ingredients.In alcohol-based hand sanitizers, it is used as a

humectant to prevent the skin from drying. Propylene glycol is used

as a solvent in many pharmaceuticals, including oral, injectable, and

topical formulations. Many pharmaceutical drugs which are insoluble

in water utilize PG as a solvent and carrier; benzodiazepine tablets

are one example.PG is also used as a solvent and carrier for many

pharmaceutical capsule preparations. Additionally, certain

formulations of artificial tears use proplyene glycol as an ingredient.