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| | BISMUTH TELLURIDE Basic information |
| | BISMUTH TELLURIDE Chemical Properties |
| Melting point | 585 °C(lit.) | | Boiling point | 1172 °C | | density | 7.642 g/mL at 25 °C(lit.) | | form | Powder | | color | Gray | | Water Solubility | Insoluble in water. | | Sensitive | Moisture Sensitive | | Crystal Structure | Cubic, Halite Structure - Space Group Fm3m | | Exposure limits | 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 DataBase Reference | 1304-82-1(CAS DataBase Reference) | | EPA Substance Registry System | Dibismuth tritelluride (1304-82-1) |
| | BISMUTH TELLURIDE Usage And Synthesis |
| Chemical Properties | Bismuth telluride is a gray or black crystalline
solid or gray powder. | | Uses | 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. | | Uses | In electronics as semiconductor. | | Uses | Semiconductors; thermoelectric
cooling; power generation application; for
commercial use, Bi2Te3 is “doped” with selenium
sulfide to alter its conductivity. | | General Description | 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. | | Reactivity Profile | 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. | | Potential Exposure | 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. | | Shipping | UN3284 Tellurium compound, n.o.s., Hazard
Class: 6.1; Labels: 6.1—Poisonous materials, Technical
Name Required. | | Incompatibilities | 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. |
| | BISMUTH TELLURIDE Preparation Products And Raw materials |
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