8.00653
Selenium dioxide
(sublimed) for synthesis
别名:
Selenium dioxide, Selenious anhydride, Selenium(IV) oxide
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关于此项目
经验公式（希尔记法）:
O2Se
化学文摘社编号:
分子量:
110.96
MDL number:
UNSPSC Code:
12352303
EC Index Number:
231-194-7
NACRES:
NA.22
Form:
crystals
vapor pressure
<1 Pa ( 20 °C)
Quality Segment
form
crystals
potency
68.1 mg/kg LD50, oral (Rat)
reaction suitability
reagent type: oxidant
pH
2 (20 °C, 10 g/L in H2O)
mp
340 °C
solubility
1353 g/L
density
3.95 g/cm3 at 20 °C
storage temp.
2-30°C
SMILES string
[Se](=O)=O
InChI
1S/O2Se/c1-3-2
InChI key
JPJALAQPGMAKDF-UHFFFAOYSA-N
Application
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:
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.
Analysis Note
Assay (iodometric): ≥ 98.0 %
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signalword
Danger
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
hcodes
存储类别
6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects