Item	Carbon black N550
Iodine Absorption Number (g/Kg)	43±5
DBP Absorption Number  (10-5m3/Kg)	121±5
Compressed DBP Absorption Number (10-5m3/Kg)	77-93
CTAB Surface Area ( 103m2/Kg)	35-49
Nitrogen Surface Area ( 103m2/Kg)	34-46
Tint strength %	_
PH Value	7±1.5
Heating Loss % ≤	1.5
Ash Content % ≤	0.7
45um mesh % ≤	0.1
Impurity	No
Fines Content % ≤	7
Modulus at 300% Mpa	-0.9±1.6