Glycerol (or glycerin, glycerine ) is a simple polyol compound. It is a colourless , odourless , viscous liquid that is widely used in pharmaceutical formulations. Glycerol has three hydrophilic hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. The glycerol backbone is central to all lipids known as triglycerides. Glycerol is sweet-tasting and of low toxicity. 

Application:
pharmacy, food, daily-use chemicals, textiles, paper-making and paints.

The specification:

specification	limits
Refractive index	≥1.4731
Glycerine	≥99.5
Water	≤0.3
Fatty acids&esters	≤0.2
Colour Shade	≤5
Relative density	≥1.2623
Esters	≥8.0
Sugars2	Negative
Halogenated cpd(ppm as Cl)2	≤5
Heavy metals ppm Pb	≤1