Product description Product:terephthalic acid(PTA) Item index testing result Appearance White powder Acid mg KOH/g 675 2 676 Moisture wt % 0.2 0.1 4 Carboxybenzaldehyde ppm 20 15 Iron ppm 0.5 0.3 Para Toluic Acid ppm 120 110 Total metals Fe, Mn, Co, Cr, Ni, Mo, Ti ppm 2 1.6 10 8 b-Color 1.5 1.2 PH (1% )dilution 2.16 Density g/cm3 1.55. Packing:50kg/bag, 1000kg/bag.