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Propylene Glycol

BP,PG,propane-1,2-diol
Production Information
PROPERTIES   &  USAGE
Properties   Usage
Chemical formula C3H8O2 chemical feedstock
Boiling point 188.2 °C (370.8 °F; 461.3 K) humectant
Molar mass 76.10 g·mol−1 solvent
Density 1.036 g/cm3 preservative in food 
Melting point −59 °C (−74 °F; 214 K)  
 
 
SPECIFICATION
Specification : pharmaceutical grade Technical Grade
Color,(APHA) : 10 max Max. 10 
Water, %  : 0.2% max  Max. 700 
Specific gravity (20/25 °C)  : 1.0350~1.0410  1.037 - 1.039 
Refractive index (25°C) : 1.4307~1.4317  1.430 - 1.432 
Distillation range (L), °C  : 184.0~189.0  185 - 189 
Distillation range (U),°C  : 184.0~189.0   
Distillation volume, Vol%  : 95% min   
Acidity, ml : 0.20 max  Max. 30.0 
Chloride, % : 0.007% max  Max. 1.0 
Sulfate, %  : 0.006% max   
Heavy metals, ppm  : 5ppm max  
Residue on ignition, %  : 0.007% max  Max. 30 
Organic Volatile impurity Chloroform, μg/g    : 60 max   
Organic Volatile impurity 1.4 dioxane, μg/g  : 380 max   
Organic Voltile impurity methylene chloride,μg/g  : 600 max   
Organic Voltile impurity trichloroethylene, μg/g    : 80max   
Assay, GLC%  : 99.5% min   
MPG Assay , wt.%  :   Min. 99.50 
Iron , wt.ppm  :   Max. 0.20