ペルオキソ二硫酸ジカリウム

解説オゾン臭のある無色吸湿性結晶，H2S2O8．ペルオキソO22－が二つのSO3基の橋かけをしている陰イオンS2O82－をもつ硫黄のオキソ酸で，硫黄の酸化数はいずれもVI．したがって，オキソ酸で中心原子の酸化段階が高いことを示す“過”を使う命名は誤りで，過硫酸，過二硫酸などは誤称．強い酸化剤．

用途原子吸光分析による水銀分析用前処理剤。

用途分析前処理剤、アクリルアミド重合開始剤。

用途水中の窒素・りん分析における試料の前処理剤。

用途樹脂の重合開始剤、漂白剤

用途合成樹脂などの重合開始剤,酸化剤,漂白剤

説明Potassium persulfate, is composed of white crystals that are soluble in water, and it decomposes below 212°F (100°C). Potassium persulfate is a dangerous fire risk in contact with organic materials. It is a strong oxidizing agent and an irritant, with a four-digit UN identification number of 1492. The primary uses are in bleaching, as an oxidizing agent, as an antiseptic, as a polymerization promoter, and in the manufacture of pharmaceuticals.

使用Potassium persulfateis a powerful oxidant, commonly used to initiate polymerizations. Potassium Persulphate used for bleaching and textile desizing, as an oxidizing agent and antiseptic, in purification of ammonium sulfate, and in the manufacture of soap and pharmaceuticals. It is also used as al laboratory oxidant and photography chemical. It is a food additive.

一般的な説明A white crystalline solid. Specific gravity 2.477. Decomposes below 100°C.

製造方法Potassium persulfate can be prepared by electrolysis of a mixture of potassium sulfate and potassium hydrogen sulfate at a high current density:2KHSO4→K2S2O8+ H2Also, the compound can be prepared by adding potassium hydrogen sulfate,KHSOto an electrolyzed solution of ammonium hydrogen sulfate, NH4HSO4.

純化方法Crystallise the persulfate twice from distilled water (10mL/g) and dry it at 50o in a vacuum desiccator. Its solubility in H2O is 1.6% at 0o, 4.5% at 20o, and 7.2% at 30o. An aqueous solution decomposes on long standing with evolution of O2 and formation of KHSO4. It is a powerful oxidising agent. Store it at ~10o. [Fehér in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 390 1963.]