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Industrial chemistry

Monopropyleneglycol

Other names: Propylene glycol; α-Propylene glycol; 1,2-Propanediol; 1,2-Dihydroxypropane; Methyl ethyl glycol (MEG); Methylethylene glycol.

CAS №: 57-55-6

Molecular formula: C3H8O2

Propylene glycol, also called 1,2-propanediol or propane-1,2-diol, is an organic compound (a diol or double alcohol) with formula C3H8O2. It is a colorless, nearly odorless, clear, viscous liquid with a faintly sweet taste, hygroscopic and miscible with water, acetone, and chloroform. The compound is sometimes called α-propylene glycol to distinguish it from the isomer propane-1,3-diol.

Use

Propylene glycol as applicable:

• Anti-freeze in the coolant, ventilation and air conditioning;

• A food additive E 1520;

• Liquid for electronic cigarettes;

• Solvent in the pharmaceutical industry.

Physical properties

Molar weight g/mol 76,09
Density, at 20°C g/cm3 1,036
Melting point °C -59
Boiling point °C 187,4
Flash point °C 107
Vapor Pressure Pa 10.7
Enthalpy of formation kJ/mol -486
Heat of vaporization kJ/kg 645
Heat capacity J/kg*K 2483
Thermal conductivity W/m*K 0.218
Viscosity Pa*s 0,042
Thermal conductivity W/m*K 0,34

Quality Standard:

Items Tech grade First grade
Purity 99.5% min. 99.8% min.
Color 10 max. 10 max.
Density(25°C) 1.037-1.039g/cm3 1.037-1.039g/cm3
Refractiveindex(25°C) 1.431-1.435 1.431-1.435
Boilingpoint 180-190 °C 185-188°C
Water 0.05% max. 0.03% max.
Alkalinity 0.002% max. 0.002wt% max.
Cl 0.007% max. 0.007wt% max.
Heavymetal(asPb) 5PPM max. 5PPM max.

Package:

• Steel drums, 215 kg,

• ISO tank.

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