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8.00653 EMD Millipore

Selenium dioxide

(sublimed) for synthesis

Synonym: Selenious anhydride, Selenium(IV) oxide

  • CAS Number 7446-08-4

  • Linear Formula O₂Se

  • Molecular Weight 110.96 g/mol

  •  EC Number 231-194-7

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Properties

packaging   5 g in Glass bottle (8006530005)
vapor pressure   <1 Pa (20 °C)
solubility   1353 g/l
density   3.95 g/cm3 (20 °C)
mp   340 °C
pH   2 (10 g/l, H₂O, 20 °C)
LD 50 oral   LD50 Rat 68.1 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.
specifications   Assay (iodometric): ≥ 98.0 %

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Safety Information

HS Code 
2811 29 90
Hazard Statement(s) 
H301 + H331: Toxic if swallowed or if inhaled
H373: May cause damage to organs through prolonged or repeated exposure.
H410: Very toxic to aquatic life with long lasting effects.
Precautionary Statement(s) 
P273: Avoid release to the environment.
P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P314: Get medical advice/ attention if you feel unwell.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
RTECS 
VS8575000
Storage class 
6.1 D Non combustible, acute toxicity cat. 3 / toxic or substances with chronic effects
WGK 
WGK 2 water endangering
Disposal 
17
Inorganic selenium compounds are toxic and must be handled with caution. Container E. Elemental selenium can be recovered by first oxidizing the salts in aqueous solution with concentrated Nitric acid (Cat.No. 100443). The addition of Sodium hydrogen sulfite solution (Item No. 806356) then causes elemental selenium to precipitate out. Aqueous phase: Container D.
Hazard Pictogram(s) 
GHS06  GHS06
Hazard Pictogram(s) 
GHS08  GHS08
Hazard Pictogram(s) 
GHS09  GHS09
Hazard Symbols 
Dangerous for the environment  Dangerous for the environment
Hazard Symbols 
Toxic  Toxic
Declaration (railroad and road) ADR, RID 
UN 3283 , 6.1, III
Declaration (transport by air) IATA-DGR 
UN 3283 , 6.1, III
Declaration (transport by sea) IMDG-Code 
UN 3283 , 6.1, III
Categories of danger 
toxic, dangerous for the environment
R Phrase 
R 23/25-33-50/53
Toxic by inhalation and if swallowed.Danger of cumulative effects.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
S Phrase 
S 20/21-28-45-60-61
When using do not eat, drink or smoke.After contact with skin, wash immediately with plenty of soap and water.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets.
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