Glycerol is obtained as a by-product in the soap industry prepared by saponification of oils and fats. It is a colourless, viscous, hygroscopic liquid. It is miscible with water and is sweet in taste.
It is used in the manufacture of:a) a polyster called glyptal and
b) glyceryl trinitrate.Glycerol is also used in medicines, cosmetics and in textile processing.