Thoriumdioxid
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Thoriumdioxid Eigenschaften
- Schmelzpunkt:
- 3050°C
- Siedepunkt:
- 4400°C
- Dichte
- 9,86 g/cm3
- L?slichkeit
- insoluble in H2O, alkaline solutions; slightly soluble in acid solutions
- Aggregatzustand
- white cubic crystals
- Farbe
- white cubic crystals, crystalline
- Widerstand (resistivity)
- 4 ∞ 10*19 (ρ/μΩ.cm)
- Wasserl?slichkeit
- insoluble H2O, alkalies [MER06]
- Crystal Structure
- Cubic
- crystal system
- Cube
- Merck
- 13,9455
- Space group
- Fm3m
- Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.55977 0.55977 0.55977 90 90 90 0.1754
- Dielectric constant
- 5.8(21℃)
- EPA chemische Informationen
- Thorium dioxide (1314-20-1)
Sicherheit
- Risiko- und Sicherheitserkl?rung
- Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher | T,R | ||
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R-S?tze: | 45-23/24/25-33 | ||
S-S?tze: | 53-36/37/39-45 | ||
RIDADR | UN 2910 7 | ||
RTECS-Nr. | XO6950000 | ||
Giftige Stoffe Daten | 1314-20-1(Hazardous Substances Data) |
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Sicherheit |
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Thoriumdioxid Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R45:Kann Krebs erzeugen.R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R33:Gefahr kumulativer Wirkungen.
S-S?tze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
Chemische Eigenschaften
Heavy white powder. Mohs hardness 6.5, very refractory. Soluble in sulfuric acid; insoluble in water.Physikalische Eigenschaften
White cubic crystals; refractive index 2.200 (thorianite); density 10.0 g/cm3; hardness 6.5 Mohs; melts at 3,390°C; vaporizes at 4,400°C; insoluble in water or alkalis; soluble in acids with difficulties.Verwenden
Thorium was discovered in 1828, and its radioactivity was discovered in 1898. In the early 1900s, the only commercial use for thorium was in gas lamp mantles. Although demand for gas mantles declined with the advent of electric lights, mantle manufacturing still accounted for 92% of thorium’s non-fuel use as late as 1950 (Hedrick 2000). The use of thorium in the United States has decreased substantially because of concerns over its naturally occurring radioactivity (Hedrick 2002). Principal uses for thorium dioxide are in high-temperature ceramics, gas mantles, nuclear fuel, flame spraying, crucibles, medicines, nonsilica optical glass, and thoriated tungsten filaments, and as a catalyst. It has also been used as a diagnostic aid (radiopaque medium) in feline medication (HSDB 2009).Thorotrast was used as a contrast agent in medical radiology. It was used extensively as an intravascular contrast agent for cerebral and limb angiography in Europe, the United States, and Japan. It was also injected directly into the nasal cavity, paranasal sinus, spleen, brain, and other sites. Thorotrast treatment led to deposition of thorium and its decay products in body tissues and organs, especially reticuloendothelial tissue and bone, which resulted in continuous lifelong alpha-particle irradiation (BEIR IV 1988). Use of Thorotrast was discontinued in the 1950s, when harmful latent effects were observed (Grampa 1971, IARC 2001).
Definition
A white insoluble compound, used as a refractory, in gas mantles, and as a replacement for silica in some types of optical glass.synthetische
Thorium dioxide is obtained as an intermediate in the production of thorium metal from monazite sand (See Thorium).The compound also can be prepared by many other methods including thermal decomposition of thorium oxalate, hydroxide, carbonate, or nitrate. Heating thorium metal in oxygen or air, and hydrolysis of thorium halides also yield thorium dioxide.
Allgemeine Beschreibung
White powder. Density 9.7 g / cm3. Not soluble in water. Used in high-temperature ceramics, gas mantles, nuclear fuel, flame spraying, crucibles, non-silicia optical glass, catalysis, filaments in incandescent lamps, cathodes in electron tubes and arc-melting electrodes.Air & Water Reaktionen
Insoluble in water.Reaktivit?t anzeigen
Has only weak oxidizing powers. Redox reactions can however still occur. Not water-reactive. Soluble in sulfuric acid.Industrielle Verwendung
Thoria, the most chemically stable oxideceramic, is only attacked by some earth alkalimetals under some conditions. It has the highestmelting point (3315°C) of the oxide ceramics.Like beryllia, it is costly. Also, it has highthermal expansion and poor thermal shockresistance.Sicherheitsprofil
Confirmed human carcinogen producing angiosarcoma, liver and kidney tumors, lymphoma and other tumors of the blood system, and tumors at the application site. See also THORIUM.Carcinogenicity
Thorium dioxide is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans.Thoriumdioxid Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Thoriumdioxid Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.
Global( 56)Lieferanten
Firmenname | Telefon | Land | Produktkatalog | Edge Rate | |
---|---|---|---|---|---|
Shaanxi Dideu Medichem Co. Ltd | +86-29-81148696 +86-15536356810 |
1022@dideu.com | China | 3882 | 58 |
Yujiang Chemical (Shandong) Co.,Ltd. | +86-17736087130 +86-18633844644 |
catherine@yjchem.com.cn | China | 990 | 58 |
Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 |
info@tianfuchem.com | China | 21634 | 55 |
Hubei Jusheng Technology Co.,Ltd. | 18871490254 |
linda@hubeijusheng.com | CHINA | 28172 | 58 |
Hubei xin bonus chemical co. LTD | 86-13657291602 |
linda@hubeijusheng.com | CHINA | 22963 | 58 |
Shaanxi Dideu Medichem Co. Ltd | +86-29-87569266 15319487004 |
1015@dideu.com | China | 3940 | 58 |
Hebei Yanxi Chemical Co., Ltd. | +8617531153977 |
allison@yan-xi.com | China | 5857 | 58 |
Qiuxian Baitai New Material Co., LTD | +8618330912755 |
sale2@hbyalin.com | China | 1658 | 58 |
Dorne Chemical Technology co. LTD | +86-86-13583358881 +8618560316533 |
Ethan@dornechem.com | China | 3097 | 58 |
Siyang Liaoning Biochemical Products Co. Ltd | +86-15221114306; +8615221114306 |
2594582574@qq.com | China | 561 | 58 |
1314-20-1(Thoriumdioxid)Verwandte Suche:
Promethium
Dicertrioxid
Uran
Europium(III)oxid
Praseodym(III,IV)oxid
Lutetiumoxid
Hafniumdioxid
Dierbiumtrioxid
Ytterbium(III)oxid
Didysprosiumtrioxid
Neodymoxid
Thoriumtetranitrat
Thorium
Thoriumdioxid
Carbonatthoriumoxid
- Thoria
- thorianite
- Thorium anhydride
- Thorium oxide (ThO2)
- Thorium(IV)
- thoriumanhydride
- thoriumoxide(tho2)
- Thorotrast
- Thortrast
- Umbrathor
- THORIUM (IV) OXIDE
- Thorium dioxide
- Thorium(Ⅳ)oxide
- 99.-th)spectro
- Thorium(IV)oxide(99.99%-Th)PURATREM
- THORIUM (IV) OXIDE (99.-TH) PURATREM
- Thorium(IV)bisoxide
- Thorium(IV)dioxide
- diketothorium
- dioxothorium
- horiumdioxide
- Thorium dioxide ISO 9001:2015 REACH
- thorium oxide 1314-20-1
- ThO2
- THORIUM OXIDE
- 1314-20-1 Thorium oxide
- 1314-20-1
- Rare-Earth Metals
- Thorium
- Catalysis and Inorganic Chemistry
- metal oxide
- Inorganics
- Catalysis and Inorganic Chemistry
- Chemical Synthesis
- Thorium
- 1