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Ammonium bisulfate

insoluble in acetone | NFPA-H = 3 | NFPA-F = 0 | NFPA-R = 0 Ammonium sulfite Ammonium sulfate Ammonium persulfate Potassium bisulfate

Ammonium bisulfate, also known as ammonium hydrogen sulfate, is a white, crystalline solid with the formula (NH4)HSO4. This salt 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.

It can also be obtained by hydrolysis of sulfamic acid in aqueous solution, which produces the salt in high purity: : It also arises by the thermal decomposition of ammonium sulfate: :

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.

Natural occurrence

A related compound of the (NH4)3H(SO4)2 formula, occurs as the rare mineral letovicite, known from coal fire environments.

References

References

  1. William Bauer, Jr. "Methacrylic Acid and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. {{doi. 10.1002/14356007.a16_441.
  2. "Letovicite".
  3. (21 March 2011). "List of Minerals".
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ammonium-compounds sulfates
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