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Thoriumdioxid

Thorium dioxide Struktur
1314-20-1
CAS-Nr.
1314-20-1
Bezeichnung:
Thoriumdioxid
Englisch Name:
Thorium dioxide
Synonyma:
ThO2;THORIUM OXIDE;Thoria;Umbrathor;Thortrast;Thorotrast;thorianite;Thorium(IV);dioxothorium;diketothorium
CBNumber:
CB7251443
Summenformel:
O2Th
Molgewicht:
264.04
MOL-Datei:
1314-20-1.mol

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/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.559770.559770.559779090900.1754
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
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)
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H302 Gesundheitssch?dlich bei Verschlucken. Akute Toxizit?t oral Kategorie 4 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P270, P301+P312, P330, P501
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P280, P302+P352, P321,P332+P313, P362
H317 Kann allergische Hautreaktionen verursachen. Sensibilisierung der Haut Kategorie 1A Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H318 Verursacht schwere Augensch?den. Schwere Augensch?digung Kategorie 1 Achtung GHS hazard pictogramssrc="/GHS05.jpg" width="20" height="20" /> P280, P305+P351+P338, P310
H341 Kann vermutlich genetische Defekte verursachen. Keimzellmutagenit?t Kategorie 2 Warnung P201,P202, P281, P308+P313, P405,P501
Sicherheit
P201 Vor Gebrauch besondere Anweisungen einholen.
P202 Vor Gebrauch alle Sicherheitshinweise lesen und verstehen.
P261 Einatmen von Staub vermeiden.
P264 Nach Gebrauch gründlich waschen.
P264 Nach Gebrauch gründlich waschen.
P270 Bei Gebrauch nicht essen, trinken oder rauchen.
P272 Kontaminierte Arbeitskleidung nicht au?erhalb des Arbeitsplatzes tragen.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P302+P352 BEI BERüHRUNG MIT DER HAUT: Mit viel Wasser/... (Hersteller kann, falls zweckm??ig, ein Reinigungsmittel angeben oder, wenn Wasser eindeutig ungeeignet ist, ein alternatives Mittel empfehlen) waschen.
P308+P313 BEI Exposition oder falls betroffen: ?rztlichen Rat einholen/?rztliche Hilfe hinzuziehen.
P333+P313 Bei Hautreizung oder -ausschlag: ?rztlichen Rat einholen/?rztliche Hilfe hinzuziehen.
P501 Inhalt/Beh?lter ... (Entsorgungsvorschriften vom Hersteller anzugeben) zuführen.

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 E-Mail 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 3942 58
Hebei Yanxi Chemical Co., Ltd.
+8617531190177
peter@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 3096 58
Siyang Liaoning Biochemical Products Co. Ltd
+86-15221114306; +8615221114306
2594582574@qq.com China 561 58

1314-20-1(Thoriumdioxid)Verwandte Suche:


  • 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
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