15678

無水ホウ酸

puriss. p.a., ≥98% (T)

• 別名: 三酸化ホウ素
• 実験式（ヒル表記法）: B₂O₃
• CAS番号: 1303-86-2
• 分子量: 69.62
• EC Number: 215-125-8
• MDL番号: MFCD00011315
• UNSPSCコード: 12352300
• PubChem Substance ID: 57647516
• NACRES: NA.21

特性

• 蒸気密度: >1 (vs air)
• 品質水準: 100
• グレード: puriss. p.a.
• アッセイ: ≥98% (T)
• 形状: solid
• 損失: ≤3% loss on ignition, 900 °C
• mp: 450 °C (lit.)
• 密度: 2.46 g/mL at 25 °C (lit.)
• 微量陰イオン: chloride (Cl^-): ≤20 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• 微量陽イオン: Ag: ≤5 mg/kg; Al: ≤50 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤30 mg/kg; Mg: ≤20 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤200 mg/kg; Ni: ≤5 mg/kg; Pb: ≤30 mg/kg; Sr: ≤5 mg/kg; Tl: ≤10 mg/kg; Zn: ≤5 mg/kg
• SMILES記法: O=BOB=O
• InChI: 1S/B2O3/c3-1-5-2-4
• InChI Key: JKWMSGQKBLHBQQ-UHFFFAOYSA-N

詳細

詳細

Boric anhydride (Boron trioxide) is a colorless glassy hygroscopic mass having rhombic crystals. Its dissolution in water is a highly exothermic reaction and orthoboric acid is formed. It can be prepared by heating boric acid. It is used as flux in metallurgical processes. It has been reported as an inhibitor of crystallization.

アプリケーション

Boric anhydride can be used as a boron precursor to synthesize:

• Boron carbon nitride nanosheet (BCN) by thermal condensation reaction with urea and melamine.
• Boron-doped reduced graphene oxide (B-rGO) via a chemical vapor deposition method.

It can also be used as an additive along with pinacol to synthesize 4-alkoxy-5-hydroxy-2-pentenoate derivatives by Pd-catalyzed reaction of α, β-unsaturated γ, δ-epoxy esters with various alcohols.

その他情報

Reagent for the decomposition of silicates by fusion

安全性情報

• ピクトグラム: GHS08
• シグナルワード: Danger
• 危険有害性情報: H360FD
• 注意書き: P201 - P202 - P280 - P308 + P313 - P405 - P501
• 危険有害性の分類: Repr. 1B
• 保管分類コード: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 1
• 引火点(°F): Not applicable
• 引火点(℃): Not applicable
• 個人用保護具 (PPE): dust mask type N95 (US), Eyeshields, Gloves