Ethylene glycol, propylene glycol, glycerin - review of properties

March, 2013

Ethylene glycol, propylene glycol, glycerin — these substances are most frequently used as the basis of antifreezes because their water solutions have a tendency to remain liquid at temperatures below 00C.

The following table shows the main properties of the above chemicals:

Properties

Ethylene glycol

Propylene glycol

Glycerin

Clas

polyatomic alcohols (fatty alcohols)

Appearance

Slightly viscous clear liquid

Moderately viscous clear liquid

Very viscous clear liquid

Color

without color

without color

without color

Odor

Without odor

Without odor

Without odor

Density at 200С, g/cm3

1,115

1,040

1,260

Melting point, 0С

-13

-60

17,9

Boiling point, 0С

197

187

290

Dynamic viscosity at 200С, mPа*s

19,9

56

1490

Freezing temperature of  50% solution, 0С

-33

-31

-23

Boiling temperature of  50% solution, 0С

>100

>100

>100

Density of 50% solution at 200С, g/cm3

1,065

1,037

1,126

Toxicity

Moderately toxic and poisonous

Non-toxic - food supplement

Non-toxic - food supplement