N220   N330    N550     N660
Iodine-absorption Number, g/Kg                                     121±5   82±7    43±6    36±6
DBP Absorption (10-5 m3/kg )                                        114±5   102±7   121±7   90±7
Compression DBP absorption (10-5 m2/kg)         90～105   78～98   77～93   66～82
Nitrogen Surface area Absorptive(103m2/Kg)          109-129   73-93    34-50    27-43
Surface of CTAB absorption rate (102 m2 / kg )    102～121  73～91   35～49   29～43
Ash Content%                                                                            0.5    0.5     0.5      0.5
45μm Sieve Residue,%≤                                                     0.10    0.10     0.10     0.10
150μm Sieve Residue,%≤                                                   0.02    0.02     0.02     0.02
Surface of He absorption rate ( 102 m2 / kg )         112～126  71～85   34～46   29～41
Tint Stregth( %)                                                                       105~125  95~111      -       -

Appearance Black Powder or Granular
Packing 25kg net bag, 16MT in 20’FCL
Usage Its mainly used in rubber industry, and in printing ink, paint, plastic industry, car tire tread etc.