-
外観
無～白色の結晶又は白色の結晶性の粉末
-
定義
本品は、リン酸(*)の二アンモニウム塩であり、次の化学式で表される。
参照表示名称：リン酸
-
溶解性
水に極めて溶けやすくエタノールにほとんど溶けない。水溶液は弱アルカリ性である。
-
解説
リン酸一水素二アンモニウム 俗称第二リン酸アンモニウム。化学式(NH4)2HPO4、式量132.06。リン酸水溶液に必要量のアンモニアを加えて得られる。無色の結晶。密度1.619。15℃の水100グラムに131グラム溶ける。アセトンに不溶である。熱すると155℃でアンモニアを失って(NH4)H2PO4となる。銅、黄銅などの蝋(ろう)付け用融剤、培養基などとして、また肥料として多く用いられる。
-
用途
分析におけるpH調整剤、試液調製原料。
-
用途
試液調製原料、無機合成原料、難燃剤原料。
-
製造
リン酸水素二アンモニウム,略称DAP．第二リン酸アンモニウムともいう．リン酸水溶液にアンモニア水を加えるか，またはアンモニアを通じ，pH 5.8～6.8で晶出させると得られる．
-
化粧品の成分用途
腐蝕防止剤、緩衝剤、口腔ケア剤
-
効能
製剤補助
-
説明
Ammonium phosphates include
mono- and diammonium orthophosphates
and ammonium polyphosphates. As discussed below, these
are made directly by reaction anhydrous ammonia with
orthophosphoric acid or superphosphoric acid. Both are
dry crystalline materials with good handling properties.
-
化学的特性
white crystalline powder
-
物理的性質
Colorless monoclinic crystal; saline taste; refractive index 1.52; density 1.619 g/cm3; melts at 155°C (decomposes); very soluble in water (57 g/100 g at 10°C and 106.7g/100g at 70°C, respectively); insoluble in alcohol, acetone, and liquid ammonia.
-
使用
Ammonium Phosphate Dibasic is a general purpose food additive
that is readily soluble in water, with approximately 57 g dissolving
in 100 g of water at 0°c. a 1% solution has a ph of 7.6–8.2. it is used
as a dough strengthener, firming agent, leavening agent, and ph
control agent. its uses include baked goods, alcoholic beverages,
condiments, and puddings. in bakery products, up to 0.25 part per
100 parts by weight of flour is used.
-
製造方法
(NH4)2HPO4 is made by reacting ammonia with phosphoric acid:
2NH3 + H3PO4 → (NH4)2HPO4.
-
定義
ChEBI: An inorganic phosphate, being the diammonium salt of phosphoric acid.
-
农业用途
With excess ammonia, the technical grade of diammonium phosphate (DAP) contains 16 to 18% nitrogen and 20to 21 % phosphorus.
DAP is an important fertilizer as well as an intermediate in the production of complex fertilizers and bulk blends.
-
接触アレルゲン
A flame retardant caused contact dermatitis in surgical personnel. It was due to excessive residual concentrations in surgical garbs.
-
安全性プロファイル
Low to moderate
toxicity. See also PHOSPHATES. When
heated to decomposition it emits very toxic
fumes of POx, NOx, and NH3.
-
職業ばく露
Used in fireproofing of textiles; wood
and paper; in soldering flux; as a fertilizer; a buffer; in
baking powder and food additives.
-
輸送方法
There are no DOT/UN listed requirements.
-
純化方法
Crystallise it from water (1mL/g) between 70o and 0o. Its solubility in H2O is 59% at room temperature and 200% at the boiling point. It slowly evolves NH3 and should be stored in a well-stoppered container. After one crystallisation, ACS grade salt had Fe, Mo, Na, Se and Ti at 1, 0.2, 1.4, 0.2 and 0.8ppm, respectively. [Gmelin’s, Ammonium (8th edn) 23 pp422-426 1936.]
-
不和合性
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions.
Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. Contact with air causes
this chemical to produce anhydrous ammonia fumes.
-
廃棄物の処理
May be flushed to sewer with
huge volumes of water.
