Ethanol , also known as ethyl alcohol , is a type of alcohol. It is flammable , tasteless , colorless , slightly toxic and has a distinctive odor , and is the main ingredient in most wines. It contains 99% pure alcohol. It is used in biosynthesis. Its chemical signals are CH3-CH2-OH, or C2H6O, or EtOH, C2H5OH or C2H6O . The only natural raw material used to make ethanol. That is: Ethanol is found as a by-product in the metabolic process of yeast. So where yeast is found, ethanol must be found. Ethanol is usually obtained from over-ripe fruit. Symbiotic yeast produces ethanol in bartam palm flowers. Some insects, such as the penteled tricycle, tend to look for sources of ethanol. However, most insects avoid sources containing ethanol as food source. As a result of natural anaerobiosis, many plants produce ethanol. Ethanol has also been found in space.