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.) |
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| Boiling point: | 684.9 °C(lit.) |
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| Density | 4.81 g/mL at 25 °C(lit.) |
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| vapor pressure | 1 mm Hg ( 157 °C) |
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| refractive index | nD20 <1.76 |
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| Flash point: | 315°C |
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| storage temp. | Store below +30°C. |
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| solubility | H2O: soluble |
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| form | powder |
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| color | white |
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| Specific Gravity | 3.95 |
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| PH | 2 (10g/l, H2O, 20℃) |
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| Water Solubility | 38.4 g/100 mL (14 ºC) |
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| Sublimation | 315 ºC |
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| Merck | 14,8434 |
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| crystal system | square |
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| Space group | P42/mbc |
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| Lattice constant |
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| Exposure limits | ACGIH: TWA 0.2 mg/m3 NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 |
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| 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 |
| F | 3 |
| TSCA | Yes |
| HS Code | 2811 29 90 |
| HazardClass | 6.1 |
| PackingGroup | II |
| Toxicity | LD50 orally in Rabbit: 68.1 mg/kg |
