チオ硫酸バリウム·水和物 化学特性,用途語,生産方法
外観
白色~ほとんど白色, 結晶性粉末~粉末
溶解性
水 0.208g/100g at 20℃ エタノールに不溶。水に溶ける。
解説
チオ硫酸バリウム.塩化バリウムとチオ硫酸ナトリウムの熱水溶液を混合し,放冷すると一水和物の結晶が析出する.100 ℃ で加熱脱水すると無水物が得られる.無水物は白色の粉末で,200 ℃ 以上に加熱すると分解する.一水和物は白色,斜方晶系の板状晶または針状晶.100 ℃ で結晶水を失う.水100 g に対する溶解度は0.208 g(20 ℃).エタノールに不溶.マッチ,夜光塗料などに用いられる.また,ヨウ素滴定における標準試薬として用いられることもある.
用途
爆薬、マッチ及び夜光塗料の原材料。
説明
Barium thiosulfate has the molecular formula of
BaS
2O
3 and the molecular weight of 249.4602 g/mol. It
can be prepared by the reaction of sodium thiosulfate
in water with the chloride of barium:
BaCl2+Na2S2O3 ? BaS2O3+2NaCl
It is not very soluble in water (0.25 g/100 ml at 15°C)
so that the solution does not need to be evaporated at
a low temperature to crystallize the product. A monohydrate
is the result. BaS
2O
3·H
2O has the CAS number of
35112-53-9. It is insoluble in ethanol. It is a white, crystalline,
water-insoluble, poisonous solid. It loses the water
of hydration at 110°C and decomposes at 228°C to form
the sulfate, sulfur and SO
2.
BaS
2O
3·H
2O is used chiefly in the manufacture of
explosives, matches, paints, and varnishes. However,the demand for this chemical is not substantial and it
is classified as a “rare” chemical.
化学的特性
White, crystalline powder.Slightly soluble in water; insoluble in alcohol.
使用
Barium thiosulfate (BaS2O3) is mainly used in explosives, matches, varnishes, and photography.
純化方法
It is very slightly soluble in water and is washed repeatedly with chilled water and dried in air at 40o.
チオ硫酸バリウム·水和物 上流と下流の製品情報
原材料
準備製品