二酢酸バリウム 化学特性,用途語,生産方法
外観
白色, 結晶〜結晶性粉末
溶解性
水に易溶 (58.8g/100ml, 0℃), エタノールに難溶。水に溶けやすく、エタノールに溶けにくい。
用途
ファインセラミックスの製造原科。
用途
有機合成触媒。
使用上の注意
純度は金属ベースで差数法によって算出したもので、重量又は容量分析等の化学的方法によるものではありません。使用目的により、正確な含量が必要な場合は、それらの方法によって測定する必要があります。
説明
Barium acetate (Ba(C
2H
3O
2)
2) is the salt of barium (II) and acetic acid.
化学的特性
Barium acetate is a white powder, which is highly soluble: at 0 °C, 55.8 g of barium acetate can be dissolved in 100 g of water. It decomposes upon heating into barium carbonate .
物理的性質
White powdery solid; density 2.47g/cm
3; decomposes on heating; highly soluble in water (55.8g /100g at 0°C), sparingly soluble in methanol (~1.43 g per liter).
使用
Barium acetate is used as a mordant for printing textile fabrics, for drying paints and varnishes and in lubricating oil. In chemistry, it is used in the preparation of other acetates; and as a catalyst in organic synthesis.
製造方法
Barium acetate is generally produced by the reaction of acetic acid with barium carbonate :
BaCO
3 + 2 CH
3COOH → (CH
3COO)
2Ba + CO
2 + H
2O
The reaction is performed in solution and the barium acetate crystallizes out. Alternatively, barium sulfide can be used :
BaS + 2 CH
3COOH → (CH
3COO)
2Ba +H
2S
Again, the solvent is evaporated off and the barium acetate crystallized.
反応性
When heated in air, barium acetate decomposes to the carbonate. It reacts with acids: reaction with sulfuric acid, hydrochloric acid and nitric acid give the sulfate, chloride and nitrate respectively.
一般的な説明
Barium acetate is the barium salt of acetic acid.
危険性
The salt or its aqueous solution is highly toxic. LD10 (oral) rabbit: 236 mg/kg; LD10 (subcutaneous) rabbit: 96 mg/kg. See Barium.
安全性プロファイル
Poison via ingestion,
intravenous, and subcutaneous routes.
When heated to decomposition it emits
acrid smoke and fumes. See also BARIUM
COMPOUNDS.
純化方法
Crystallise the salt twice from anhydrous acetic acid and dry it under vacuum for 24hours at 100o. [Beilstein 2 I 49, 2 II 117, 2 III 192, 2 IV 114.]
二酢酸バリウム 上流と下流の製品情報
原材料
準備製品