... . water insoluble substance %1.5pH value(1% aqueous solution)3.5-5.0SO2- %, ≤3.0Ammoniacal nitrogen %, ≤0.01Fe, %, ≤2As, %, ≤0.0002Mn ... as the case of deliquescence, the results remain unchanged; 3, suitable PH value of wide, strong adaptability and wide ... and all kinds of chemical waste water treatment; 3, industrial application; paper sizing, printing dyeing, Cement accelerating agent, hardener ...