硫酸アルミニウムセシウム

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P264：取扱い後は皮膚をよく洗うこと。

  P264：取扱い後は手や顔をよく洗うこと。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P302+P352：皮膚に付着した場合：多量の水と石鹸で洗うこと。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

  P321：特別な処置が必要である（このラベルの．．． を見よ）。

  P332+P313：皮膚刺激が生じた場合：医師の診断/手当てを受けるこ と。

  P362：汚染された衣類を脱ぎ、再使用す場合には洗濯をすること。

硫酸アルミニウムセシウム 化学特性,用途語,生産方法

• 化学的特性

  colorless, cub crystal(s); used in mineral waters [HAW93] [CRC10]

• 調製方法

  The alkali metals and Al are present in pollucite in about the right proportions for the formation of alum. Hence, Clusius and Stern can follow the procedure. The mineral is decomposed with hydrochloric acid, and Cs is precipitated as a low-solubility alum by treatment with sulfuric acid. Thus, 0.5 kg of very finely pulverized (0.01 mm.) pollucite in one liter of 18% hydrochloric acid is evaporated to dryness on a water bath. This procedure is repeated three times, and each time the dry residue is extracted with one liter of HaO + 100 ml. of concentrated hydrochloric acid. This is followed by suction filtration on a filter cloth. The filtered extracts are combined and concentrated to one liter, and the silicic acid, which separates almost completely, is decanted. The alum is then gradually precipitated with 200 ml. of concentrated H3SO4. After cooling, about 545 g of crude yellowish alum is obtained. The mother liquor is practically free of Cs. The crystallization is repeated several times, dissolving 250 g of the alum in 2.5 liters of boiling water in a four-liter Erlenmeyer flask. On slow cooling (constant agitation, 10 hours), the alum again separates. The material obtained after six crystallizations shows no traces of other alkali metals. One way to ensure pure alum is to check the purity of the mother liquor from which it is precipitated.

• 純化方法

  Recrystallise it from hot water (3mL/g).

硫酸アルミニウムセシウム 生産企業

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