Bismuth telluride
- Dibismuth tritelluride
- bismuth sesquitelluride
Bismuth telluride | |
| |
| Formula | Bi2Te3 |
| Structure | |
| Description | Gray powder or pieces. No odor. |
| Uses | Substance is used in electronics as semiconductor. |
| Registry Numbers and Inventories. | |
| CAS | 1304-82-1 |
| EC (EINECS/ELINCS) | 215-135-2 |
| RTECS | EB3110000 |
| RTECS class | Other |
| UN (DOT) | 3284 |
| Merck | 12,1331 |
| Beilstein/Gmelin | 11110 (G) |
| Canada DSL/NDSL | NDSL |
| US TSCA | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | Bi2Te3 |
| Formula mass | 800.76 |
| Melting point, °C | 585 |
| Density | 7.69 g/cm3 |
| Solubility in water | Insoluble |
| Thermal expansion | 0.0000129/K |
| Heat of fusion | 117.20 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep container tightly closed, in a cool dry location. |
| Handling | Wear protective clothing to prevent contamination. Implement engineering and work practice controls to reduce and maintain concentration of exposure at low levels. Use good housekeeping and sanitation practices. Do not use tobacco or food in work area. Wash thoroughly before eating and smoking. do not blow dust off clothing or skin with compressed air. |
| Protection | Wear appropriate protective gloves, clothing and goggles. |
| Respirators | Wear positive pressure self-contained breathing apparatus (SCBA). |
| Small spills/leaks | Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. |
| Stability | Stable at normal temperatures and pressures. |
| Incompatibilities | Strong acids, moisture, water and oxidizing agents. |
| Decomposition | May react with water to evolve toxic gases. |
| Fire. | ||||
| Fire fighting | Use method most appropriate to fight surrounding fire. | |||
| Fire potential | Non-Combustible | |||
| Combustion products | Fire may produce irritating, corrosive and/or toxic gases. | |||
| Health. | |
| Exposure limit(s) | NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp) OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp) |
| Exposure effects | The toxological properties of this substance have not been fully investigated. |
| Ingestion | May cause irritation to the respiratory system, a dry mouth, metallic taste, gingivitis, garlic odor to breath, sweat and urine. |
| Inhalation | Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed. |
| Skin | Avoid any skin contact. See Inhalation. |
| Eyes | See Inhalation. |
First aid |
|
| Ingestion | Seek medical assistance. |
| Inhalation | Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. |
| Skin | Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. |
| Eyes | Immediately flush with running water for at least 20 minutes. |
| Transport. | ||
| UN number | 3284 | |
| Response guide | 151 | |
| Hazard class | 6.1 | |
| Packing Group | I; II; III | |