Glycerin, also known as glycerol, is a colorless, odorless, sweet-tasting, viscous liquid organic compound.
However, many people find that their glycerin sometimes turns yellow for no apparent reason. Because glycerin has a shelf life of three years and should be stored in a clean and dry place. If stored at high temperatures for three years, glycerin will turn yellow.
Additionally, if the glycerin does not meet USP standards, it may contain impurities that react with oxygen in the air and cause it to turn yellow. Lastly, double bonds formed during the distillation process due to poor temperature control.As well as the amino group of the protein in glycerin, can also react with the double bond and cause it to turn yellow.
