りん酸ほう素

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

  H302：飲み込むと有害

  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

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P301+P312：飲み込んだ場合：気分が悪い時は医師に連絡する こと。

りん酸ほう素 価格

りん酸ほう素 化学特性,用途語,生産方法

• 化学的特性

  white not hygroscopic crystal(s); prepared by reacting boric acid and phosphoric acid up to 1200°C: B(OH)3+H3PO4=BPO4+3H2O; used in special glasses [HAW93]

• 物理的性質

  Physical Properties White infusible solid; density 1.873 g/mL; sublimates slowly above 1,450°C; soluble in water, decomposes to phosphoric acid and boric acid; pH of 1% solution is ~2.0.

• 使用

  Boron phosphate is used as an acid catalyst for dehydration of alcohols to olefins; isomemization of olefins; nitration of aromatic hydrocarbons; polymerization of aldehydes and other synthetic reactions. It also is used as a flux in silica-based porcelain and ceramics; special glasses; and acid cleaners.

• 製造方法

  Boron phosphate is prepared by heating an equimolar mixture of boric acid and phosphoric acid at 1,000 to 1,200°C:
  H₃BO₃ + H₃PO₄ → BPO₄ + 3H₂O
  Various preparative methods are adopted at nonstoichiometric formulations, incomplete dehydration or using oxide additives to obtain boron phosphate of varying purity for its catalytic applications. The compound also forms hydrates (tri- tetra-, penta-, and hexahydrates) which readily decompose in water to phosphoric acid and boric acid.

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