Ammonium phosphate (ammonium phosphate)

Japanese: リン酸アンモニウム(燐酸アンモニウム) - りんさんアンモニウム(英語表記)ammonium phosphate
Ammonium phosphate (ammonium phosphate)
The chemical formula is (NH 4 ) 3 PO 4 . It is also called ammonium phosphate tribasic. The trihydrate is the more commonly known form. The trihydrate, (NH 4 ) 3 PO 4 ・3H 2 O, is a colorless columnar crystal. It loses ammonia easily in air. It is soluble in water. When the aqueous solution is heated, it loses ammonia and produces (NH 4 )H 2 PO 4 . The trihydrate is obtained by adding aqueous ammonia to an aqueous solution of ammonium dihydrogen phosphate and ammonium chloride, sealing it, and cooling it. It is called ammonium phosphate and is widely used as a fertilizer. The hydrogen salts, (NH 4 ) 2 HPO 4 and (NH 4 )H 2 PO 4, are sometimes simply called ammonium phosphate.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
化学式(NH4)3PO4。第三リン酸アンモニウムともいう。3水和物が普通に知られている。3水和物(NH4)3PO4・3H2Oは無色柱状晶。空気中でアンモニアを失いやすい。水に可溶。水溶液を熱するとアンモニアを失って(NH4)H2PO4を生成する。リン酸二水素アンモニウムと塩化アンモニウムの水溶液にアンモニア水を加えて密閉し,冷却すると3水和物が得られる。リン安と呼ばれ,肥料として広く用いられる。水素塩(NH4)2HPO4,(NH4)H2PO4を単にリン酸アンモニウムということもある。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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