Ammonium bisulfate
From Infogalactic: the planetary knowledge core
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Ball-and-stick model of an ammonium cation (left) and a bisulfite anion (right) | |||
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Names | |||
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IUPAC name
Ammonium hydrogen sulfate
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Identifiers | |||
7803-63-6 | |||
ChemSpider | 23057 | ||
Jmol 3D model | Interactive image | ||
PubChem | 16211166 | ||
RTECS number | WS990000 | ||
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Properties | |||
(NH4)HSO4 | |||
Molar mass | 115.11 g/mol | ||
Appearance | White solid | ||
Density | 1.78 g/cm3 | ||
Melting point | 147 °C (297 °F; 420 K) | ||
Very soluble | |||
Solubility in other solvents | Soluble in methanol insoluble in acetone |
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Vapor pressure | {{{value}}} | ||
Related compounds | |||
Other anions
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Ammonium thiosulfate Ammonium sulfite Ammonium sulfate Ammonium persulfate |
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Other cations
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Sodium bisulfate Potassium bisulfate |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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verify (what is ?) | |||
Infobox references | |||
Ammonium bisulfate, also known as ammonium hydrogen sulfate, is a white, crystalline solid with formula (NH4)HSO4. It is the product of the half-neutralization of sulfuric acid by ammonia.
Production
It is commonly collected as a byproduct of the "acetone cyanohydrin route" to the commodity chemical methyl methacrylate.[1]
It can also be obtained by hydrolysis of sulfamic acid in aqueous solution, which produces the salt in high purity:
- H3NSO3 + H2O → [NH4]+[HSO4]−
It also arises by the thermal decomposition of ammonium sulfate:
- (NH4)2SO4 → (NH4)HSO4 + NH3
Applications
It can be further neutralized with ammonia to form ammonium sulfate, a valuable fertilizer. It can be used as a weaker alternative to sulfuric acid, although sodium bisulfate is much more common.
References
- ↑ William Bauer, Jr. "Methacrylic Acid and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a16_441.
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