8.00653

Selenium dioxide

(sublimed) for synthesis

• 别名: Selenium dioxide, Selenious anhydride, Selenium(IV) oxide
• 经验公式（希尔记法）: O₂Se
• CAS号: 7446-08-4
• 分子量: 110.96
• MDL號碼: MFCD00003562
• 分類程式碼代碼: 12352303
• 酶委員會索引編號: 231-194-7
• NACRES: NA.22

属性

• 蒸汽壓力: <1 Pa ( 20 °C)
• 品質等級: 200
• 形狀: crystals
• 效力: 68.1 mg/kg LD₅₀, oral (Rat)
• 反應適用性: reagent type: oxidant
• pH值: 2 (20 °C, 10 g/L in H₂O)
• mp: 340 °C
• 溶解度: 1353 g/L
• 密度: 3.95 g/cm³ at 20 °C
• 儲存溫度: 2-30°C
• SMILES 字串: [Se](=O)=O
• InChI: 1S/O2Se/c1-3-2
• InChI 密鑰: JPJALAQPGMAKDF-UHFFFAOYSA-N

说明

應用

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.

分析報告

Assay (iodometric): ≥ 98.0 %

安全信息

• 象形圖: GHS06,GHS08,GHS09
• 訊號詞: Danger
• 危險聲明: H301 + H331 - H373 - H410
• 防範說明: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• 危險分類: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
• 儲存類別代碼: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• 水污染物質分類（WGK）: WGK 2
• 閃點（°F）: Not applicable
• 閃點（°C）: Not applicable