Dibismuttritellurid

Bezeichnung:Dibismuttritellurid

CAS-Nr1304-82-1

Englisch Name:BISMUTH TELLURIDE

CBNumberCB1153118

SummenformelBi2Te3

Molgewicht800.76

MOL-Datei1304-82-1.mol

Synonyma

Dibismuttritellurid

Dibismuttritellurid physikalisch-chemischer Eigenschaften

Schmelzpunkt	585 °C(lit.)
Siedepunkt	1172 °C
Dichte	7.642 g/mL at 25 °C(lit.)
Löslichkeit	insoluble in H2O; soluble in ethanol
Aggregatzustand	Powder
Farbe	Gray
Wasserlöslichkeit	Insoluble in water.
Sensitive	Moisture Sensitive
Crystal Structure	Cubic, Halite Structure - Space Group Fm3m
Expositionsgrenzwerte	ACGIH: TWA 10 mg/m3; TWA 5 mg/m3; TWA 0.1 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; TWA 10 mg/m3; TWA 0.1 mg/m3
InChIKey	GUYIRKJSQUOSJV-UHFFFAOYSA-N
CAS Datenbank	1304-82-1(CAS DataBase Reference)
EPA chemische Informationen	Dibismuth tritelluride (1304-82-1)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/21/22-36/37/38
S-Sätze:	26-36
RIDADR	UN 3284 6.1/PG 3
WGK Germany	3
RTECS-Nr.	EB3110000
TSCA	Yes
HazardClass	6.1
Giftige Stoffe Daten	1304-82-1(Hazardous Substances Data)

Gefahreninformationscode (GHS)

BISMUTH TELLURIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
Bismuth telluride is a gray crystalline solid.Molecular weight=800.83; Specific gravity (H2O:1)=7.7;Freezing/Melting point=573℃; Vapor pressure=0 mmHgat 20℃. Hazard Identification (based on NFPA-704 MRating System): Health 2, Flammability 2, Reactivity 2.Note: Commercial mix of doped bismuth tritelluride maycontain 80% Bi2Te3, 20% stannous telluride, plus some tellurium. Insoluble in water. Doped and undoped have similarphysical properties.
Chemische Eigenschaften
Bismuth telluride is a gray or black crystalline solid or gray powder.
Verwenden
Bi2Te3, along with Sb2Te3 and other structurally analogous semiconductors, is widely regarded as one of the best materials for room-temperature thermoelectric devices. Bismuth(III) telluride is a key component of thermoelectric materials that have reached ZT values as high as 2.4 at room temperature.
Verwenden
Semiconductors; thermoelectric cooling; power generation application; for commercial use, Bi2Te3 is “doped” with selenium sulfide to alter its conductivity.
Verwenden
In electronics as semiconductor.
Allgemeine Beschreibung
Gray or black hexagonal platelets with a metallic luster or gray powder. Mp: 586°C. Density: 7.8 g cm-3. An alloy of two metallic elements.
Reaktivität anzeigen
BISMUTH TELLURIDE may emit toxic fumes of tellurium when heated to decomposition. Incompatible with strong oxidizing agents such as nitric acid or bromine, chlorine or fluorine. Moderate fire hazard by reaction with such materials. May react with strong acids to evolve toxic gases; may react slowly with water to evolve toxic gases. Slight explosion hazard with moisture.
Hazard
Toxic.
Health Hazard
Bismuth telluride, either alone or doped with selenium sulfide, is apparently of very low toxicity.
In limited industrial experimental work with bismuth telluride under controlled conditions (vacuum hoods), no adverse health effects were encountered other than tellurium breath.
mögliche Exposition
Bismuth telluride is used in thermoelectric cooling, power generation, semiconductor manufacture; pharmaceuticals; medical therapy; cosmetics. Exposure involves those working in “Silicon Valley” and similar locations around the world. An alloy of two metallic elements that are sometimes doped with SeS. The SeS dopant alters the electrical properties, but has too low a concentration to affect the chemical properties.
Erste Hilfe
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seekmedical attention immediately. If this chemical contactsthe skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately.If this chemical has been inhaled, remove fromexposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing hasstopped and CPR if heart action has stopped. Transferpromptly to a medical facility. When this chemical hasbeen swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make anunconscious person vomit.
Note to physician: For severe poisoning BAL [BritishAnti-Lewisite, dimercaprol, dithiopropanol (C3H8OS2)] hasbeen used to treat toxic symptoms of certain heavy metalspoisoning. In the case of bismuth poisoning it may haveSOME value. Although BAL is reported to have a largemargin of safety, caution must be exercised, because toxiceffects may be caused by excessive dosage. Most can beprevented by premedication with 1-ephedrine sulfate(CAS: 134-72-5).
Lager
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Bismuth telluride must bestored to avoid contact with strong oxidizers (such as chlorine, bromine, and fluoride), since violent reactions occur.Store in tightly closed containers in a cool, well-ventilatedarea away from moisture.
Versand/Shipping
UN3284 Tellurium compound, n.o.s., Hazard Class: 6.1; Labels: 6.1—Poisonous materials, Technical Name Required.
Inkompatibilitäten
Reacts with acids forming toxic gases. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Toxic and flammable gas may slowly evolve from contact with moisture.

Dibismuttritellurid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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