Sodium hydrogen sulfate monohydrate (NaHSO4•H2O)- Crystalline introduce:
Sodium bisulfate, also known as sodium hydrogen sulfate, is the sodium salt of the bisulfate anion, with the molecular formula NaHSO4. Sodium bisulfate is an acid salt formed by partial neutralization of sulfuric acid by an equivalent of sodium base, typically in the form of either sodium hydroxide (lye) or sodium chloride (table salt). It is a dry granular product that can be safely shipped and stored. The anhydrous form is hygroscopic. Solutions of sodium bisulfate are acidic, with a 1M solution having a pH of around 1.
Molar mass:120.06 g/mol (anhydrous);138.07 g/mol (monohydrate)
Appearance: white solid
Density: 2.742 g/cm3 (anhydrous);1.8 g/cm3 (monohydrate)
Melting point: 58.5 °C (137.3 °F; 331.6 K) (monohydrate);315 °C (anhydrous)
Boiling point: decomposes to Na2S2O7 (+ H2O) at 315 °C (599 °F; 588 K)
Solubility in water:28.5 g/100 mL (25 °C);100 g/100 mL (100 °C)
Solubility: Insoluble in ammonia
Acidity (pKa): 1.99
Crystal structure:triclinic (anhydrous);monoclinic (monohydrate)
Sodium hydrogen sulfate monohydrate is used in metal finishing and cleaning products. It is used to lower the pH of water for an effective chlorination in swimming pools. It is also used as a urine acidifier to reduce urinary stones in cats. Further, it is used in controlling outbreaks of crown-of-thorns starfish. It is a primary ingredient used in jewelry making to clean the surfaces. In addition to this, it is used as a food additive and serves as a reagent for the decomposition of basic metal oxides by fusion.
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