8.00653

Selenium dioxide

(sublimed) for synthesis

• 別名: Selenium dioxide, Selenious anhydride, Selenium(IV) oxide
• 実験式（ヒル表記法）: O₂Se
• CAS番号: 7446-08-4
• 分子量: 110.96
• UNSPSCコード: 12352303
• EC Index Number: 231-194-7
• NACRES: NA.22

特性

• 蒸気圧: <1 Pa ( 20 °C)
• 品質水準: 200
• フォーム: crystals
• 有効性: 68.1 mg/kg LD₅₀, oral (Rat)
• 反応適合性: reagent type: oxidant
• pH: 2 (20 °C, 10 g/L in H₂O)
• mp: 340 °C
• 溶解性: 1353 g/L
• 密度: 3.95 g/cm³ at 20 °C
• 保管温度: 2-30°C
• InChI: 1S/O2Se/c1-3-2
• InChI Key: JPJALAQPGMAKDF-UHFFFAOYSA-N

詳細

アプリケーション

Selenium dioxide (SeO₂) is mainly used to oxidize the activated carbon-bearing positions (α-methylene carbon atoms), particularly at allylic or propargylic sites. The more substituted end of the double bond undergoes oxidation.
It can also be used as an oxidizing reagent to synthesize:

• Amides by oxidative amidation of aldehydes with amines.
• Tropone from cycloheptatriene in the presence of potassium dihydrogen phosphate.
• Acetyltetrahydrobenzofurans by oxidation of conjugated dienones.
• 9-hydroxy-undec-10-ynoate from methyl undec-10-ynoate.

アナリシスノート

Assay (iodometric): ≥ 98.0 %

安全性情報

• ピクトグラム: GHS06,GHS08,GHS09
• シグナルワード: Danger
• 危険有害性情報: H301 + H331 - H373 - H410
• 注意書き: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• 危険有害性の分類: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
• 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 2
• 引火点(°F): Not applicable
• 引火点(℃): Not applicable