Difference between revisions of "Ammonium sulfate" - New World Encyclopedia

From New World Encyclopedia
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* California Plant Health Association. 2002. ''Western Fertilizer Handbook.'' Danville, IL: Interstate Publishers. ISBN 0813432103.
 
* California Plant Health Association. 2002. ''Western Fertilizer Handbook.'' Danville, IL: Interstate Publishers. ISBN 0813432103.
* The Fertilizer Institute. 2007. [http://www.tfi.org/factsandstats/fertilizer.cfm About Fertilizer.] ''The Fertilizer Institute''. Retrieved September 1, 2007.
+
 
 
* Havlin, John L., Samuel L. Tisdale, James D. Beaton, and Werner L. Nelson. 2004. ''Soil Fertility and Fertilizers: An Introduction to Nutrient Management,'' 7th ed. Upper Saddle River, NJ: Pearson Prentice Hall. ISBN 0130278246.
 
* Havlin, John L., Samuel L. Tisdale, James D. Beaton, and Werner L. Nelson. 2004. ''Soil Fertility and Fertilizers: An Introduction to Nutrient Management,'' 7th ed. Upper Saddle River, NJ: Pearson Prentice Hall. ISBN 0130278246.
* Walters, Charles. 2003. ''Eco-farm: An Acres U.S.A. Primer.'' Austin, TX: Acres U.S.A. ISBN 0911311742.
 
  
 +
* International Fertilizer Development Center, and United Nations Industrial Development Organization. 1998. ''Fertilizer Manual.'' Dordrecht: Kluwer Academic. ISBN 0792350324.
  
* Properties: UNIDO and International Fertilizer Development Center (1998), ''Fertilizer Manual'', Kluwer Academic Publishers, ISBN 0792350324.
+
* Walters, Charles. 2003. ''Eco-farm: An Acres U.S.A. Primer.'' Austin, TX: Acres U.S.A. ISBN 0911311742.
  
 
== External links ==
 
== External links ==
  
 
* [http://www.encorbio.com/protocols/AM-SO4.htm Ammonium Sulfate (Precipitation) Calculator]. EnCor Biotechnology Inc. Retrieved October 9, 2008.
 
* [http://www.encorbio.com/protocols/AM-SO4.htm Ammonium Sulfate (Precipitation) Calculator]. EnCor Biotechnology Inc. Retrieved October 9, 2008.
 +
 +
* [http://www.tfi.org/factsandstats/fertilizer.cfm About Fertilizer.] The Fertilizer Institute. Retrieved October 9, 2008.
  
 
* [http://www.scorecard.org/chemical-profiles/summary.tcl?edf_substance_id=7783-20-2 Chemical Profile: Ammonium Sulfate]. Retrieved October 9, 2008.
 
* [http://www.scorecard.org/chemical-profiles/summary.tcl?edf_substance_id=7783-20-2 Chemical Profile: Ammonium Sulfate]. Retrieved October 9, 2008.

Revision as of 15:23, 9 October 2008

Ammonium sulfate
Ammonium sulfate.png
IUPAC name Ammonium sulfate
Other names ammonium sulfate (2:1);
diammonium sulfate;
sulfuric acid diammonium salt;
mascagnite;
Actamaster;
Dolamin
Identifiers
CAS number [7783-20-2]
SMILES [O-]S([O-])(=O)=O.[NH4+].[NH4+]
Properties
Molecular formula (NH4)2SO4
Molar mass 132.14 g/mol
Appearance Fine white hygroscopic granules or crystals.
Density 1.77 g/cm³ @ 50 °C (122 °F)
Melting point

235-280 °C, 508-553 K, 455-536 °F (decomposes)

Solubility in water 70.6 g/100 mL (0 °C) and
103.8 g/100 mL (100 °C)[1]
Critical relative humidity 79.2% at 30 °C
Related Compounds
Related compounds Ammonium iron sulfate
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Ammonium sulfate is an inorganic chemical compound commonly used as a fertilizer. It contains 21 percent nitrogen in the form of ammonium ions and 24 percent sulfur as sulfate ions.

Occurrence in nature

Ammonium sulfate occurs naturally as the rare mineral mascagnite in volcanic fumaroles and due to coal fires on some dumps.[2]

Properties

Ammonium sulfate is a salt of ammonia and sulfuric acid, and its chemical formula is (NH4)2SO4. It is not soluble in alcohol or liquid ammonia. It is slightly hygroscopic, absorbing water from the air at relative humidity above 81 percent (at about 20 °C).

Synthesis

Ammonium sulfate is prepared commercially by reacting ammonia with sulfuric acid (H2SO4). Ammonium sulfate is prepared commercially from the ammoniacal liquor of gas-works and is purified by recrystallization. It forms large, rhombic prisms, has a somewhat saline taste and is easily soluble in water. The aqueous solution on boiling loses some ammonia and forms an acid sulfate.

Uses

Ammonium sulfate is used largely as an artificial fertilizer for alkaline soils. In the soil the sulfate ion is released and forms sulfuric acid, lowering the pH balance of the soil (as do other sulfate compounds such as aluminum sulfate), while contributing essential nitrogen for plant growth.

It is also used as an agricultural spray adjuvant for water soluble insecticides, herbicides, and fungicides. There it functions to bind iron and calcium cations that are present in both well water and plant cells. It is particularly effective as an adjuvant for 2,4-D (amine), glyphosate, and glufosinate herbicides.

It is also used in the preparation of other ammonium salts.

In biochemistry, ammonium sulfate precipitation is a common method for purifying proteins by precipitation. As such, ammonium sulfate is also listed as an ingredient in many vaccines used in the United States, according to the Centers for Disease Control and Prevention (CDC).[3]

Ammonium sulfate is also a food additive.[4]

See also

Notes

  1. Handbook of Chemistry and Physics
  2. Mascagnite. Mindat.org. Retrieved October 9, 2008.
  3. Vaccine Excipient & Media Summary, Part 2. Centers for Disease Control and Prevention. Retrieved October 9, 2008.
  4. Lower-Carb Italian Herb Bread. panerabread.com. Retrieved October 9, 2008.

References
ISBN links support NWE through referral fees

  • California Plant Health Association. 2002. Western Fertilizer Handbook. Danville, IL: Interstate Publishers. ISBN 0813432103.
  • Havlin, John L., Samuel L. Tisdale, James D. Beaton, and Werner L. Nelson. 2004. Soil Fertility and Fertilizers: An Introduction to Nutrient Management, 7th ed. Upper Saddle River, NJ: Pearson Prentice Hall. ISBN 0130278246.
  • International Fertilizer Development Center, and United Nations Industrial Development Organization. 1998. Fertilizer Manual. Dordrecht: Kluwer Academic. ISBN 0792350324.
  • Walters, Charles. 2003. Eco-farm: An Acres U.S.A. Primer. Austin, TX: Acres U.S.A. ISBN 0911311742.

External links

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