UN1075 PETROLEUM GASES,LIQUEFIED 2.1 500 PPMW TOTAL FLUORIDE AS 1,2,3,4 TETRAFLUOROBENZENE, 5 PPMW TOTAL NITROGEN AS ACETONITRILE, 200 PPMW TOTAL CHLORIDE AS CHLOROBENZENE, 20 PPMW TOTAL SULFUR AS DIMETHYL SULFIDE, PROPANE BALANCE CERTIFIED, SIZE 33AL LIQUID PHASE