Naphtha (petroleum), light heat- soaked, steam-cracked; low boiling point naphtha — unspecified (A complex combination of hydrocarbons obtained by the fractionation of steam cracked naphtha after recovery from a heat soaking process. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C 4 through C 6 and boiling in the range of approximately 0 °C to 80 °C.)