What is white yellow or sometimes transparent and is used in toothpaste chewing gum glue and soap?

The substance you are describing is likely glycerin, also known as glycerol. It is a colorless, odorless liquid that is often used as a humectant in various products, including toothpaste, Chewing Gum, glue, and soap, due to its ability to retain moisture and improve texture. Glycerin is safe for consumption and skin contact, making it a versatile ingredient in both personal care and food products.