Sodium Bisulfate
Structural Formula Vector Image
Title: Sodium Bisulfate
CAS Registry Number: 7681-38-1
Additional Names: Sodium acid sulfate; sodium hydrogen sulfate; sodium pyrosulfate
Molecular Formula: HNaO4S
Molecular Weight: 120.06
Percent Composition: H 0.84%, Na 19.15%, O 53.30%, S 26.71%
Line Formula: NaHSO4
Properties: Fused NaHSO4, hygroscopic pieces. d 2.435. mp ~315°. Sol in 2 parts water, 1 part boiling water; dec by alcohol into sodium sulfate and free H2SO4. Keep well closed.
Melting point: mp ~315°
Density: d 2.435
Derivative Type: Monohydrate
Properties: Odorless crystals. When strongly heated it changes into pyrosulfate. Sol in about 0.8 part water; dec by alcohol into sodium sulfate and free H2SO4. The aq soln is strongly acid. pH of 0.1 molar soln: 1.4.
Use: Fusion of minerals to make them sol for analysis; for liberating CO2 in carbonic acid baths. Technical grades are used for pickling metals, carbonizing wool, bleaching and swelling leather, manuf magnesia cements, etc.

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