Bismuth telluride

800.76

809.69500

215-135-2

3284

Gray hexagonal plates

-0.91740

Gray Powder

7.26 g/cm³

535 °C

1172 °C

Insoluble in water.

Keep container tightly closed in a dry and well-ventilated place. Moisture sensitive.

0 mm Hg (approx) (NIOSH, 2016)|0 mmHg (approx)

Reacts with water or moisture to release toxic and flammable gases; heated to decompose toxic tellurium oxide fumes

Heat of Formation: -8 kcal/mol. Resistivity: 0.00033 ohm-cm. Thermal conductivities at room temperature: lambda(0) = 0.15 watt/cm-deg; lambda(e) = 1.4X10-3 watt/cm-deg. Energy gap: 0.15 eV. Electron mobility: 800 sq cm/volt-sec. Hole mobility: 400 sq cm/volt-sec

No rapid reaction with air No rapid reaction with water

Metals, Less Reactive

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.

6.1

UN 3284 6.1/PG 3

3

20/21/22-36/37/38

26-36

EB3110000

Xn

Warehouse ventilated, low temperature and dry

Reacts with water or reacts with strong oxidants to produce a slight explosion

P261-P280-P305 + P351 + P338

H302 + H312 + H332-H315-H319-H335

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal and plant life; and conformance with environmental and public health regulations.

Strong oxidizers (e.g., bromine, chlorine, or fluorine), moisture, nitric acid (decomposes).|Reacts with moisture to evolve a toxic gas.

Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways. (ERG, 2016)

Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]: Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. 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. (ERG, 2016)

Skin: Wear appropriate personal protective clothing to prevent skin contact. Eyes: Wear appropriate eye protection to prevent eye contact. Wash skin: The worker should immediately wash the skin when it becomes contaminated. Remove: Work clothing that becomes wet or significantly contaminated should be removed and replaced. Change: No recommendation is made specifying the need for the worker to change clothing after the work shift. Provide: Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection. Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availability of water from a sink or hose could be considered adequate.] (NIOSH, 2016)|Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.|Wear appropriate eye protection to prevent eye contact.|Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands.|Wear appropriate personal protective clothing to prevent skin contact.|For more Personal Protective Equipment (PPE) (Complete) data for Bismuth telluride (6 total), please visit the HSDB record page.

Moderate fire hazard by spontaneous chemical reaction with powerful oxidizers.

Slight explosion hazard by chemical reaction with powerful oxidizers; reacts with moisture.

Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Wear self contained breathing apparatus for fire fighting if necessary.

Personal precautions: Use personal protective equipment. Avoid dust formation. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. Environmental precautions: Do not let product enter drains. Methods and materials for containment and cleaning up: Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal.

Work clothing that becomes wet or significantly contaminated should be removed and replaced.|The worker should immediately wash the skin when it becomes contaminated.|Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Provide appropriate exhaust ventilation at places where dust is formed. Normal measures for preventive fire protection.|Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.|For more Preventive Measures (Complete) data for Bismuth telluride (6 total), please visit the HSDB record page.

Permissible Exposure Limit: Table Z-1 8-hr Time Weighted Avg: 15 mg/cu m (total dust); 5 mg/cu m (respirable fraction). /Bismuth telluride, undoped/

Recommended Exposure Limit: 10 Hour Time-Weighted Average: 10 mg/cu m (total); 5 mg/cu m (resp).

moderately toxic

Exposure Routes: inhalation, skin and/or eye contact Symptoms: Irritation eyes, skin, upper respiratory system; garlic breath Target Organs: Eyes, skin, respiratory system (NIOSH, 2016)

Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical. Skin: If this chemical contacts the skin, immediately wash the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing, wash the skin with soap and water, and get medical attention promptly. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. Swallow: If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2016)

/SRP:/ Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on the left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Poisons A and B/|/SRP:/ Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poisons A and B/|/SRP:/ Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Consider administering a beta agonist such as albuterol for severe bronchospasm ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam or lorazepam ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poisons A and B/

/HUMAN EXPOSURE STUDIES/ Under controlled conditions (vacuum hoods) ... subjects reported no adverse health effects except for the typical manifestation of "telluride breath" (i.e., sharp garlic odor) which occurs as a result of exposure to telluride or its compounds. /telluride compounds/

bismuth telluride

Grade: Ingot, single crystals.

Thermocouples of /bismuth telluride/ convert electricity into heat (Peltier effect) and heat into electricity (Seebeck effect) ... used mostly below 200 °C|Soichiometric combination of the elements.|Single crystals have been grown by the Czochralski technique in which a hydrogen atmosphere was used to minimize the evaporation of tellurium. ... All crystals so pulled are the "P" type.