Propylene Gycol(C3H8O2), also known as propane-1,2-diol is an organic compound which is viscous colorless liquid possesses a sweet taste. This chemical is widely used in food processing as the E-number E1520 and in low temperature heat exchanging applications. It is used as a humectant (E1520) and preservative in food products. Propylene Gycol is also used in different edible item like ice cream, liquid sweeteners, dairy and coffee based drinks. Apart from that, avoid direct contact with eyes and skin, as it cause irritation and itching.