| Ammonium bisulfate | |
|---|---|
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Ammonium hydrogen sulfate |
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| Identifiers | |
| CAS number | 7803-63-6 |
| PubChem | 16211166 |
| ChemSpider | 23057 |
| RTECS number | WS990000 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | (NH4)HSO4 |
| Molar mass | 115.11 g/mol |
| Appearance | White solid |
| Density | 1.78 g/cm3 |
| Melting point |
147 °C, 420 K, 297 °F |
| Solubility in water | Very soluble |
| Solubility in other solvents | Soluble in methanol insoluble in acetone |
| Hazards | |
| MSDS | External MSDS |
| EU Index | Not listed |
| NFPA 704 |
0
3
0
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| Related compounds | |
| Other anions | Ammonium thiosulfate Ammonium sulfite Ammonium sulfate Ammonium persulfate |
| Other cations | Sodium bisulfate Potassium bisulfate |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Ammonium bisulfate, also known as ammonium hydrogen sulfate, is a white, crystalline solid when it is completely pure, with formula (NH4)HSO4. It is commonly collected as a byproduct of flue-gas desulfurization, formed by partial neutralization of sulfuric acid (H2SO4) aerosols by gaseous ammonia, NH3. Indeed, the solid material can collect on and foul solid surfaces in the flues. It is too acidic for most end uses, and is corrosive to the skin. 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.