Ethane is a colorless and odorless gas at room temperature. It’s primary use is for petrochemicals, particularly ethylene production. Some refineries use ethane as fuel and refrigerant gas. Ethane is the lightest of the 4 natural gas liquids (NGL’s). The other 3 NGL’s are propane, butane, and natural gasoline. Ethane is used as a feedstock and converted to ethylene in petrochemical plants. Ethylene is used to produce polyethylene. Polyethylene is the most commonly used plastic.