It consists predominantly of hydrocarbons having a carbon number of C4, predominantly 1butene and 2-butene, containing also butane and isobutene and boiling in the range of approximately - 12 °C to 5 °C.) fraction; Petroleum gas
Koosneb peamiselt süsivesinikest süsiniku aatomite arvuga C4, valdavalt 1-buteen ja 2-buteen, sisaldades ka butaani ja isobuteeni, keemispiiridega umbes –12 °C kuni 5 °C.)