Crude Glycerin is a dark brown, viscous and hygroscopic liquid. This substance is derived from trans-esterification of crude edible oils. For application of this product, some refining process are done on it. After this stage its' content will be increased and will be reached to USP/BP grade that is called Refined Glycerin and could be used in many fields.
Glycerin is chemically a trihydric alcohol that is called also as " Glycerol". This commodity is by product of oleo chemicals and biodiesel production. Refined Glycerin is the final product of the processing and refining for purification of crude ones . After refining its purity will become between 95% or more.