Potassium Pyrosulfate
Title: Potassium Pyrosulfate
CAS Registry Number: 7790-62-7
CAS Name: Disulfuric acid dipotassium salt
Additional Names: "anhydrous" potassium acid sulfate
Molecular Formula: K2O7S2
Molecular Weight: 254.32
Percent Composition: K 30.75%, O 44.04%, S 25.22%
Line Formula: K2S2O7
Properties: Colorless, fused pieces. d 2.28. mp ~325°. Sol in water. The aq soln is strongly acid.
Melting point: mp ~325°
Density: d 2.28

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