Home Categories Inorganic chemistry Selenium dioxide
A7306912

Selenium dioxide , AR,99% , 7446-08-4

Synonym(s):
NSC 56753;Selenious anhydride, Selenium(IV) oxide;Selenium dioxide;Selenium oxide

CAS NO.:7446-08-4

Empirical Formula: O2Se

Molecular Weight: 110.96

MDL number: MFCD00003562

EINECS: 231-194-7

Update time: 2022-07-08

PRODUCT Properties

Melting point: 315 °C (subl.)(lit.)
Boiling point: 684.9 °C(lit.)
Density  4.81 g/mL at 25 °C(lit.)
vapor pressure  1 mm Hg ( 157 °C)
refractive index  nD20 <1.76
Flash point: 315°C
storage temp.  Store below +30°C.
solubility  H2O: soluble
form  powder
color  white
Specific Gravity 3.95
PH 2 (10g/l, H2O, 20℃)
Water Solubility  38.4 g/100 mL (14 ºC)
Sublimation  315 ºC
Merck  14,8434
crystal system square
Space group P42/mbc
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.836220.836220.506129090900.3539

Exposure limits ACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3
Stability: Stable. Incompatible with organic materials, strong acids, ammonia, nitric acid, halogen acids. Protect from moisture.

Description and Uses

Selenium dioxide (SeO2) is used as an oxidizing agent, as a catalyst, and as an antioxidant for lubricating oils and grease.

Safety

Symbol(GHS) 
GHS06,GHS08,GHS09
Signal word  Danger
Hazard statements  H301+H331-H373-H410
Precautionary statements  P273-P301+P310+P330-P304+P340+P311-P314
Hazard Codes  T,N,Xn
Risk Statements  36/38-50/53-33-23/25-51/53-20/22
Safety Statements  26-61-60-45-28A-20/21-28
RIDADR  UN 3440 6.1/PG 3
WGK Germany  2
RTECS  VS8575000
3
TSCA  Yes
HS Code  2811 29 90
HazardClass  6.1
PackingGroup  II
Toxicity LD50 orally in Rabbit: 68.1 mg/kg

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