Physical and chemical properties
Announce Density: 4.81g/cm three
Melting point: 70 ℃
Boiling point: 684.9 ℃
Selenite crystal Appearance: colorless or white crystalline powder Solubility: soluble in water, soluble in ethanol, insoluble in ammonia [1]
1. React with reducing substances to form simple substances selenium Precipitation (oxidation of selenite): H two SeO three + 2SO two + H two O = 2H two SO four + Se↓ (H two SeO three As oxidant, Se as reduction product)
2. Reflected with strong oxidant Selenic acid (Reducibility of selenite): H two SeO three + Cl two + H two O = H two SeO four + 2HCl (H two SeO three As reducing agent, H two SeO four Is oxidation product)
application area
Announce It is mainly used as analytical reagent, reducing agent or oxidant, and also for preparation Chromogenic agent 。 Calculate chemical data
Announce Reference value for drainage parameter calculation (XlogP): None
Number of hydrogen bond donors: 2
Number of hydrogen bond receptors: 3
Number of rotatable chemical bonds: 0
Number of tautomers: 0
Topological molecular polar surface area: 57.5
Number of heavy atoms: 4
Surface charge: 0
Complexity: 26.3
Number of isotope atoms: 0
Determine the number of atomic structure centers: 0
Number of uncertain atomic structure centers: 0
Determine the number of chemical bond structure centers: 0
Number of uncertain chemical bond structure centers: 0
Number of covalent bond units: 1 [1]
Acute toxicity: mice intravenous LD fifty ：11mg/kg。 [1]
security information
Announce S20/21：When using do not eat, drink or smoke.
Do not eat, drink or smoke when using.
S28：After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).
After skin contact, immediately use a large amount of (designated by the manufacturer).
S45：In case of accident or if you feel unwell, seek medical advice immediately (show the lable where possible).
In case of an accident or feeling unwell, seek medical advice immediately (show the label if possible).
S60：This material and/or its container must be disposed of as hazardous waste.
The substance and its container must be disposed of as hazardous waste.
S61：Avoid release to the environment. Refer to special instructions/Safety data sheets.
To avoid release into the environment, refer to special instructions/safety receipt instructions.
R23/25：Toxic by inhalation and if swallowed.
Toxic by inhalation and if swallowed.
R33：Danger of cumulative effects.
Risk of accumulation.
R50/53：Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
It is extremely toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment.
