1)   4-Phenolsulfonic Acid Sodium Salt dihydrate

      MF: C6H5NaO4.2H20  

     Appearance: white crystal powder

     Assay: 99%min.

     Chloride: 0.1% max.

     Sulfate: 1.0% max.

     Fe: 0.01% max

     Heavy metal ( as Pb): 0.005% max.

     Insoluble matterr in water: 0.1% max.

2)  4-Phenolsulfonic Acid Sodium Salt anhydrate

     MF: C6H5NaO4 

    Appearance: white powder

    Assay: 99%min.

    Chloride: 0.05% max.

    Sulfate: 0.5% max.

    Fe: 0.002% max

    Heavy metal ( as Pb): 0.002% max.

    Insoluble materrer in water: 0.01% max.

    Package: 25KG/kraft bag