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.
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ammonium sulfate

[ə′mōn·yəm ′səl‚fāt]
(inorganic chemistry)
(NH4)2SO4 Colorless, rhombic crystals which melt at 140°C and are soluble in water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Associated to the single superphosphate, the ammonium sulfate provides sulfur, important for protein synthesis, seen that the simultaneous ministration of nitrogen and sulfur, in the proportions from 7:1 to 11:1, contributes for the recovery of the decumbens grass (Brachiaria), increases the leaf area, the production of dry mass and increases the efficiency in the use of water (Bonfim-Silva et al., 2007).
Interactions significant by concentrations of calcium sulfate and ammonium sulfate concentrations were observed in the population fluctuation of nymphs + adults ([F.sub.15,24] = 309, P < 0.01), soil moisture (%) ([F.sub.15,24] = 498, P < 0.01), average infestation ([F.sub.15,24] = 3,021, p < 0.01); attacked plants expressing reduced size ([F.sub.15,24] = 102, P < 0.01), yellowish plants ([F.sub.15,24] = 1,002; P < 0.01) and productivity ([F.sub.15,24] = 876, P < 0.01).
As shown in Fig 2, atrazine application alone had no significant effect on redroot pigweed density, but nicosulfuron application alone and in mixture of different adjuvants (Volck oil, ammonium sulfate, ammonium nitrate, and situgate) decreased weed density 17.92, 41.02, 41.02, 61.45, and 33.33% compared to the control, respectively.
Selected fertilizer samples were doped with ammonium sulfate and urea (potential adulterants) to test the robustness of ATR-FTIR spectroscopy in detecting their presence.
The nitrogen in ammonium phosphate and ammonium sulfate can wreak terrible havoc on aquatic ecosystems, creating algae blooms that kill fish by choking out their oxygen.
Alternatively, ammonium sulfate has been suggested to act as an oviposition attractant by reducing water turbidity (7).
In this study, to identify age-dependent discrepancies in BT and potential relevant mechanisms, we compared the concentrations of BT that were measured by use of a routine ammonium sulfate precipitation assay (15) to calculated BT using the Vermeulen mass action law model (17) in 2 populations of young and aging men.
The solution came in the form of Class Act[R] and Alliance, corn-based water conditioners that contain concentrated ammonium sulfate to alleviate sedimentation and plugged nozzles.
What's more, for every kilogram of caprolactam manufactured, says chemist Robert Raja, also of the University of Cambridge, 4 kg of ammonium sulfate are generated.
Upon complettion of (1), add 25ml of ferrous ammonium sulfate (0.4N) and allow to stand one minute.