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Sodium Bisulfate


Other Names:

Sodium hydrogen sulfate







General Information:


Structure:



CAS Number: 7681-38-1 (anhydrous)

    10034-88-5 (monohydrate)

Molecular Weight: 120.06 g/mol (anhydrous)

    138.07 g/mol (monohydrate)

Appearance: White solid (anhydrous)

    White solid (monohydrate)

Chemical Formula: NaHSO4 (anhydrous)

    NaHSO4-H2O (monohydrate)

Acidity (pKa): 1.99


Sodium bisulfate (NaHSO4) is available in anhydrous form and as a monohydrate. Anhydrous sodium bisulfate is hygroscopic. Sodium bisulfate is generally used to adjust the pH of a solution.




Common Uses:


Acid used to lower pH



Procedure excerpt:

. . . The resulting mixture was allowed to warm to RT for 2.5 h, after which time it was diluted with H2O and acidified to pH 2.5 using 1M NaHSO4 . . .

[full procedure]




References:


1) Patent Reference: WO2012069948, page 78, (3.9 MB)

2) Wikipedia: Sodium bisulfate (link)

3) www.sigmaaldrich.com: Sodium hydrogen sulfate (link)