Coal tar pitch Related properties of medium temperature coal tar pitch Parametersunits first classsecond class Softening point (ring-ball)80~9075~95 Ti( toluene insolubles)15~25n25 Qi( quinoline insolubles)6~106~15 B- resin no less than-- Coking value no less than -- Dust no more than0.30.3 Moisture no more than55 Related properties of modified coaltar pitch Parameters unitsfiest classsecond class Softening point(ring-ball)100~115100~120 Ti( toluene insolubles) 28~34>26 Qi( quinoline insolubles) 8~146~15 B- resin no less than1816 Coking value no less than5450 Dust no more than0.30.3 Moisture no more than55