ammonium sulfate


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ammonium sulfate,

chemical compound, (NH4)2SO4, a colorless-to-gray, rhombohedral crystalline substance that occurs in nature as the mineral mascagnite. It is soluble in water and insoluble in alcohol or liquid ammonia. It is prepared commercially by passing ammoniaammonia,
chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor.
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, obtained from destructive distillation of coal, into sulfuric acid and is used as a fertilizerfertilizer,
organic or inorganic material containing one or more of the nutrients—mainly nitrogen, phosphorus, and potassium, and other essential elements required for plant growth.
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, in preparing other ammonium compounds, and for fireproofing.

ammonium sulfate

[ə′mōn·yəm ′səl‚fāt]
(inorganic chemistry)
(NH4)2SO4 Colorless, rhombic crystals which melt at 140°C and are soluble in water.
References in periodicals archive ?
Three nitrogen sources were selected: (1) ammonium sulfate (21-0-0), (2) ammonium chloride (25-0-0) and (3) urea (45-0-0).
When the highly filled polymer (20% oxetane polymer, 64% ammonium sulfate, and 16% aluminum, by weight) shaped into a sphere was placed in organic solvents such as ethyl acetate and THF in which the oxetane polymer is soluble and the fillers are not, it was found that the shape and size of the particle were unaffected despite the dissolution of the polymer.
Among combination form of N, 50:50 combination of ammonium nitrate: ammonium sulfate had greatest economic yield.
Studies on influence of inorganic and organic nitrogen source such as sodium nitrate, Ammonium nitrate, aluminum ammonium sulfate, potassium nitrate, ammonium sulfate and Urea, Yeast extract, Soya been meal, peptone and beef extract at 1% (w/v) concentration to the fermentation medium showed a mixed trend on enzyme production.
When mixed with fuel oil -- a common method of using ammonium nitrate as an explosive -- the new ammonium sulfate nitrate fertilizer did not detonate.
The new technique, which uses a biological catalyst, could help reduce the production of ammonium sulfate, by tonnage the chemical industry's number-one waste product, says AlliedSignal's Haya Zemel.
Agrifos owns and operates a plant in Pasadena, Texas, that produces primarily ammonium sulfate fertilizer.
Once completed, the crystallizer will refine high- quality ammonium sulfate, a by-product of the caprolactam manufacturing process and a key component in plant fertilizer sold by American Plant Food.
After grinding down yard greenery and leaves, he adds ammonium sulfate and water to help it decompose.
The Davis researchers have shown in rats that ozone's effects on health are magnified in the presence of acidic air-pollution aerosols such as sulfuric acid and ammonium sulfate.
com/research/b5a386/the_2009_import_an) has announced the addition of the "The 2009 Import and Export Market for Ammonium Sulfate Fertilizers in Australia" report to their offering.