The specification of coal tar pitch as follows: Modified CT Pitch: Softening Point:105-110C;QI:8-12%; TI:26%min; Ash content: 0.3%max; Coking Value:55%min. Middle Temperature CT Pitch: Softening Point: 85-100C; QI:10%max; TI:15-25%; Ash content :0.3%max; Volatile matter content :58-68. High Temperature CT Pitch: Softening Point : 120-124C; QI:6-10%; TI:26%min; Ash content :0.3%max; Sulpfur:0.6%max.