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CAS#;99-76-3//Appearance:Colorless or White Crystalline powder//Assay（% ）:99.0% Min//Appearance of Solution:Conform//Acidity :Conform//Relative Substances:Conform//Sulfate (SO42- , %):0.10 Max.//Residue on ignition (%):0.10 Max.//Melting point (°C):125 - 128°C// Organic volatile impurities: Conform///////////////////////////