|
Appearance
|
Clear colourless liquid
|
|
Purity (by GC)
|
Min 99.5%
|
|
Identity (IR)
|
Conforms
|
|
Identity D (Ph Eur) )
|
Melting point of crystals formed on reaction - 121 to 128°C
|
|
Appearance of the substance
|
Passes test
|
|
Density (d20°C/4°C)
|
1.035 - 1.040
|
|
Density (d25°C/25°C)
|
1.035 - 1.037
|
|
Refractive index (20°C; 589 nm)
|
1.431 - 1.433
|
|
Boiling Point
|
184 - 189 °C
|
|
Acidity
|
Passes test
|
|
Chloride (Cl)
|
Max 0.007 %
|
|
Sulphate (SO4)
|
Max 0.006%
|
|
Heavy metal (as Pb)
|
Max 0.0005 %
|
|
Isomers of dipropylene glycol
|
Passes test
|
|
Diethylene glycol (GC)
|
Max 0.1%
|
|
Ethylene glycol (GC)
|
Max 0.1%
|
|
Residual solvents (ICH Q3C)
|
Excluded by production process
|
|
Oxidizing substances
|
Passes test
|
|
Reducing substance
|
Passes test
|
|
Sulphated ash
|
Max 0.007 %
|
|
Water
|
Max 0.2%
|