General Information:
Dowfrost is a thick, clear, and nearly odorless substance with a faintly sweet taste. It is an organic double alcohol with a chemical formula of C3H8O2 and a CAS number of 57-55-6. Its official name in IUPAC is propane-1,2-diol, though it is also known as α-propylene glycol, methylethylene glycol, and Sirlene. It is moisture-absorbent and mixes well with water, acetone, ethanol, diethyl ether, and chloroform.
Physical Properties:
Dowfrost is a thick, clear, and nearly odorless substance with a faintly sweet taste. It is an organic double alcohol with a chemical formula of C3H8O2 and a CAS number of 57-55-6. Its official name in IUPAC is propane-1,2-diol, though it is also known as α-propylene glycol, methylethylene glycol, and Sirlene. It is moisture-absorbent and mixes well with water, acetone, ethanol, diethyl ether, and chloroform.
Physical Properties:
Molecular mass: 76.10 g/mol
Melting point: -59° C
Boiling point: 187.6° C
Vapor pressure: 0.2 (23° C)
Vapor density: 2.62 (air=1)
Viscosity: 91.41 cp (10.45° C)
Surface tension: 40.1 g/s2 (25° C)
Refractive index: 1.4324 (20° C)
Heat of vaporization: 66.27 kJ/mol
Heat of combustion: -1828 kJ/mol
Melting point: -59° C
Boiling point: 187.6° C
Vapor pressure: 0.2 (23° C)
Vapor density: 2.62 (air=1)
Viscosity: 91.41 cp (10.45° C)
Surface tension: 40.1 g/s2 (25° C)
Refractive index: 1.4324 (20° C)
Heat of vaporization: 66.27 kJ/mol
Heat of combustion: -1828 kJ/mol
Production:
Dowfrost is usually sourced from either glycerol or propylene oxide hydrolysis. Production involves either catalytic (150°-180°C) or non-catalytic high-temperature process (200°-220°C) using ion exchange resin or a small amount of sulfuric acid or alkali. Final products include 20% propylene glycol, 1.5% dipropylene glycol, and other polypropylene glycols. Then, resulting glycols are further distilled to be purified prior to storage and distribution. To assure high quality and compliance with hygienic standards, production is monitored and controlled through a track-and-trace system from the start of process up to delivery point. Dowfrost is a product of The Dow Chemical Company.
References:
Wikipedia - http://en.wikipedia.org/wiki/Propylene_glycol
University of Akron Chemical Database - http://ull.chemistry.uakron.edu/erd/Chemicals/8000/
7709.html
Cefic - http://www.propylene-glycol.com/production.html
Dowfrost is usually sourced from either glycerol or propylene oxide hydrolysis. Production involves either catalytic (150°-180°C) or non-catalytic high-temperature process (200°-220°C) using ion exchange resin or a small amount of sulfuric acid or alkali. Final products include 20% propylene glycol, 1.5% dipropylene glycol, and other polypropylene glycols. Then, resulting glycols are further distilled to be purified prior to storage and distribution. To assure high quality and compliance with hygienic standards, production is monitored and controlled through a track-and-trace system from the start of process up to delivery point. Dowfrost is a product of The Dow Chemical Company.
References:
Wikipedia - http://en.wikipedia.org/wiki/Propylene_glycol
University of Akron Chemical Database - http://ull.chemistry.uakron.edu/erd/Chemicals/8000/
7709.html
Cefic - http://www.propylene-glycol.com/production.html
