Thorium Ditelluride SDS


Product name: Thorium ditelluride

Other Names: Thorium telluride, Ditellanylidenethorium

Formula: ThTe2


CAS RN: [70495-35-1]


IBI Labs

3495 N. Dixie Hwy. Unit # 8

Boca Raton, FL 33431

Tel: 561-826-0061 Fax: 561-892-8450

Emergency Telephone Numbers


USA & Canada contact number: 1-800-535-5053

International contact number: 1-352-323-3500


NIH PubChem CID: 112418

EC (EINECS/ELINCS): 274-624-9

UN (DOT): 2910

Beilstein/Gmelin: 1033356 (G)


US TSCA: Listed

Korea ECL: Listed


Molecular Formula: Te2Th

Molecular Weight: 487.24

Appearance: Black Hexagonal Crystals

Stability: Stable under recommended storage conditions



  • Keep in a cool, dry, dark location in a tightly sealed container or cylinder.
  • Keep away from incompatible materials, ignition sources, and untrained individuals.
  • Secure and label area.
  • Protect containers and cylinders from physical damage.
  • All chemicals should be considered hazardous.
  • Avoid direct physical contact.
  • Use appropriate, approved safety equipment.
  • Untrained individuals should not handle this chemical or its container.

Handling: Handling should occur in a chemical fume hood.

Protection: Wear appropriate protective gloves, clothing, and goggles.

Respirators: Wear positive pressure self-contained breathing apparatus (SCBA).

Small spills and leaks:

  • Do not touch damaged packages or spilled material.
  • Cover liquid spill with sand, earth, or other noncombustible absorbent material.
  • Cover the powder spill with a plastic sheet or tarp to minimize spreading.
  • Contact the radiation safety officer.


Control Parameters

Components with limit values that require monitoring at the workplace: Not required.

Additional information: The lists that were valid at the time of creation were used as the basis.

Exposure Controls

At any detectable concentration: Any self-contained breathing apparatus with a full facepiece operated in a pressure-demand or other positive-pressure mode.

Any supplied-air respirator with a full facepiece operated in a pressure-demand or other positive-pressure mode or other positive-pressure mode with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive-pressure mode.

Escape – any air-purifying, full-facepiece respirator with a high-efficiency particulate filler.

Any appropriate escape-type, self-contained breathing apparatus.

General Information:

  • Keep away from foodstuffs, beverages, and feed.
  • Immediately remove all soiled and contaminated clothing.
  • Wash hands before breaks and at the end of work.
  • Store protective clothing separately.

Breathing equipment:

  • In case of brief exposure or low pollution, use a respiratory filter device.
  • In case of prolonged or extensive exposure, use an independent respiratory protective device.

Clothing: Employees handling radioactive substances should wear disposable overgarments, including head and foot coverings. These garments are also recommended even if the employee uses a “glove box” containment system. Certain clothing fibers may be useful in dosimetry so clothing should be kept.

Protection of hands:

  • The glove material must be impermeable and resistant to the product, the substance, and the preparation.
  • Due to missing tests, no recommendation for the glove material can be given for the product, the preparation, and the chemical mixture.
  • Selection of the glove material on consideration of the penetration times, rates of diffusion, and the degradation

Material of gloves: The selection of appropriate gloves depends on the material, while the quality standards may vary among manufacturers.

Penetration time of glove material: The manufacturer of the protective gloves must determine and adhere to the specific breakthrough time.

Eye protection: Not required.

Firefighting and Other Immediately Dangerous to Life or Health Conditions

Use any self-contained breathing apparatus with a full facepiece respirator and a high-efficiency particulate filter.

Use any supplied air respirator with a full facepiece operated in a pressure-demand or other positive-pressure mode or other positive-pressure modes with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive-pressure modes.


The presence of radioactive material will not affect the fire control processes and the selection of techniques.

  • Small fires: Dry chemical, carbon dioxide, water spray, or regular foam.
  • Large fires: Water spray, fog (flooding amounts).

Fire potential: May burn but does not ignite readily.


Exposure Effects

Ingestion, skin, and eyes: See inhalation.


  • There is minimal risk if the packaging remains intact.
  • Package damage can result in a measurable release of radiation, but the risk is still low.

First Aid Measures

General advice:

  • Consult a physician.
  • Show this safety data sheet to the doctor in attendance.
  • Move out of dangerous areas.


  • Apply artificial respiration if the patient is not breathing.
  • Administer oxygen if breathing is difficult.
  • See Ingestion.

Skin and eyes:

  • Immediately flush with running water for at least 20 minutes.
  • See Ingestion.


  • Medical problems take priority over radiological concerns.
  • Use first aid treatment according to the nature of the injury.
  • Do not delay the care and transport of a seriously injured person.


Personal precautions, protective equipment, and emergency procedures:

  • Wear respiratory protection.
  • Avoid dust formation, breathing vapors, breathing dust, mist, or gas.
  • Ensure adequate ventilation.
  • Evacuate personnel to safe areas.
  • For personal protection see section 8.

Environmental precautions:

  • Prevent further leakage or spillage if safe.
  • Do not let the 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.


Waste from residues/unused products: Waste disposal must follow appropriate Federal, State, and local regulations. If unaltered, this product may be disposed of by treatment at a permitted facility or as advised by your local hazardous waste regulatory authority. Residue from fires extinguished with this material may be dangerous.

Contaminated packaging: Do not reuse empty containers and dispose of them as unused products.



  • Should not be disposed of with household garbage.
  • Do not allow the product to reach the sewage system.

Uncleaned packaging:

  • Disposal must be made according to official regulations.
  • Recommended cleansing agent: Water, if necessary, with cleansing agents.


UN Number: 2910

Response guide: 161

Hazards class: 7


Packing Group:

The classification of substances with multiple hazards must be determined following the criteria presented in the regulations mentioned above. Due to the various quantities and combinations of materials being shipped at one time, the information above must be determined based on the characteristics of the specific shipment.


Copyright 2014 IBI Labs. License granted to make unlimited paper copies for internal use only.

IBI Labs requires that those who receive their materials comply with 29 CFR 1910.1200(h), which mandates that employers provide employees with effective information and training about hazardous chemicals in their workplace.

The contents of this document are believed to be accurate as of the date of revision and are provided in good faith. However, it is recommended that recipients use this information as supplementary and exercise caution and judgment regarding its accuracy and suitability. Please note that IBI Labs cannot be held responsible for any damage, direct or indirect, that occurs because of using the information provided in this Safety Data Sheet.

IBI Labs makes no warranties, expressed or implied, including warranties of merchantability and fitness for a particular purpose. This information is provided without warranty, and any use of the product that does not conform to this Safety Data Sheet, or that is used in combination with any other product or process, is the user’s responsibility.

Revision Date: 07/03/2024


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