Ammonium Phosphate

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ammonium phosphate

[ə′mōn·yəm ′fäs‚fāt]
(inorganic chemistry)
(NH4)2HPO4 A salt of ammonia and phosphoric acid that forms white monoclinic crystals, which are soluble in water; used as a fertilizer and fire retardant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ammonium Phosphate


(in Russian, ammofos), double ammonium-phosphate concentrated mineral fertilizer. It is composed principally of monoammonium phosphate (NH4 H2 PO4) with an admixture of diammonium phosphate [(NH4)2 HPO4 ]. It contains 45–52 percent phosphoric anhydride and 10–12 percent nitrogen. It is used on various soils as a fundamental or supplementary fertilizer.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Abbreviations: APP, ammonium polyphosphate; MAP, monoammonium phosphate; MCP' monocalcium phosphate; TG-MAP, technical grade monoammonium phosphate.
The key types of mineral fertilizers in its product range are monoammonium phosphate (ammophos), diammonium phosphate and compound (NPK) fertilizers: diammophoska, NPK-13-19-19, liquid compound fertilizers and NPS.
According to the National Fire Protection Association and quoted by H3R Aviation, "Any chemical powder can produce some degree of corrosion or other damage, but monoammonium phosphate is acidic and corrodes more readily than other dry chemicals...."
The fire-retardant chemicals mostly used for wood products contain boron, phosphorus, phosphoric acid (PA) and its salts, including monoammonium phosphate (MAP) and diammonium phosphate (DAP).
[ClickPress, Thu May 15 2014] Phosphate Fertilizers Market By Active Ingredient (Diammonium Phosphate, Monoammonium Phosphate, Triple Superphosphate, Single Superphosphate, Superphosphate, Calcium Phosphate), By Crop Type Cereals & Grains, Oil Seeds, Fruits & Vegetables), By Geography: Trends & Forecasts To 2018
Summary: Moroccan phosphate group "Office Cherifien des phosphates" (OCP) has announced the launch of a major investment program to expand its production of Diammonium Phosphate (DAP)and Monoammonium Phosphate (ADP).
Lombi E, McLaughlin MJ, Johnston C, Armstrong RD, Holloway RE (2004) Mobility and lability of phosphorus from granular and fluid monoammonium phosphate differs in a calcareous soil.
In the next step, the individual veneer specimens were placed in plexiglass boxes and laid horizontally 4 cm apart from each other in 3 percent or 6 percent aqueous solutions of borax ([Na.sub.2][B.sub.4][O.sub.7] x 10[H.sub.2]O) or boric acid ([H.sub.3]B[O.sub.3]), or in 3 percent or 11 percent aqueous solutions of monoammonium phosphate (MAP) (N[H.sub.4][H.sub.2]P[O.sub.4]) or diammonium phosphate (DAP) ([(N[H.sub.4]).sub.2]HP[O.sub.4]).
The 3 P fertilisers were: granular monoammonium phosphate (MAP, 18 : 22 : 0 w/w %) (~3 mm granule diameter), liquid technical grade monoammonium phosphate (TGMAP; 12:26:0 w/w %), and liquid ammonium polyphosphate (APP; 16:23:0 w/w %).