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MSDS Material Safety Data Sheet
CAS

12058-20-7

File Name: 12058-20-7.asp

                                           MATERIAL SAFETY DATA SHEET



I PRODUCT IDENTIFICATION

Trade Name: Molybdenum Telluride Synonyms: Molybdenum Ditelluride
Chemical Family: Metal Telluride Formula: MoTe2
CAS #: 12058-20-7


II HAZARDOUS INGREDIENTS

TLV (Units): Not set 5 mg/m3 (Mo) 0.1 mg/m3 (Te) OSHA PEL: Not set 5 mg/m3 (Mo)
Molybdenum Telluride %: 100

HMIS Hazard Rating: Health: 3 Flammability: 0 Reactivity: 0 Personal Protection: E


III PHYSICAL DATA

Boiling Point: No data Melting Point: No data
Density: No data Vapor Pressure: N/A
% Volatiles by Volume: N/A Solubility in H2O: No data
Appearance and Odor: No data


IV FIRE AND EXPLOSION HAZARDS DATA

Flash Point (Method used): N/A Autoignition Temperature: N/A
Flammable Limits: Non-flammable Upper: N/A Lower: N/A

Extinguishing Media: Use dry chemical, CO2 or graphite.
Special Fire Fighting Procedures: Wear a self-contained breathing apparatus and full-protective clothing to prevent contact with
skin and eyes.

Unusual Fire & Explosion Hazard: When heated to decomposition, it may emit very toxic fumes.


V HEALTH HAZARD INFORMATION

Routes of Entry: Inhalation? Yes Skin? Yes Ingestion? Yes

Toxicity Data: No specific data for this compound
Mo Data: orl-rat TDLO: 6050 ug/kg (35W preg) ipr-rat LDLO: 114 mg/kg
Te Data: orl-rat TDLO: 330 mg/kg (1-22D preg) ims-rat TDLO: 13 mg/kg (10D preg)
itr-rat LDLO: 200 mg/kg scu-dog LDLO: 290 mg/kg

Effects of Over Exposure:

Inhalation: May cause sneezing, coughing, difficulty breathing, nausea and irritation of the respiratory tract.
Dermal: May cause irritation, itching and dermatitis.
Eye: May cause burning sensation, irritation, redness and watering of the eyes if comes in contact.

Other (Specify): Te compounds: Elemental tellurium has relatively low toxicity. It impairs a garlic-like odor to the breath and
sweat. Heavy exposures may in addition, result in headache, drowsiness, metallic taste, loss of appetite and nausea. Various tellu-
rium salts may also produce similar symptoms. Large doses can be fatal.
Medical Conditions Generally Aggravated by Exposure: Respiratory disorders.
Carcinogenicity: Experimental TER (Te) NTP? No IARC Monographs? No OSHA Regulated? No

EMERGENCY AND FIRST AID PROCEDURES:

EYES: Flush eyes with lukewarm water for 15 minutes. Seek medical attention.
SKIN: Brush material off skin. Wash affected area with soap and water. Seek medical attention.
INHALATION: Remove victim to fresh air. Administer oxygen if breathing is difficult. Seek medical attention.
INGESTION: Give 1-2 glasses of milk or water and induce vomiting. Seek immediate medical attention.


VI REACTIVITY DATA

Stability: Stable
Incompatibility (Material to Avoid): Strong acids, strong bases.

Hazardous Decomposition Products: Mo, Te
Hazardous Polymerization: Will not occur


VII SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled: Wear a self-contained breathing apparatus and full protective clothing.
Isolate the area where the spill occurred and insure that the proper ventilation is available. Vacuum up spill using a high efficiency
unit and place in a container for proper disposal. Take care not to raise dust.

Waste Disposal Method: Dispose of in accordance with applicable Federal, State and Local regulations.


VIII SPECIAL PROTECTION INFORMATION

Respiratory Protection: Wear NIOSH-approved dust-mist-fume cartridge respirator.
Ventilation: Local Exhaust: Maintain exposures below TLV level for Mo & Te.
Special: Handle in a controlled environment. Mechanical (general): Not recommended.

Protective Gloves: Neoprene Eye Protection: Safety Glasses
Other Protective Equipment: Wear protective clothing to prevent contamination of skin and clothes.


IX SPECIAL PRECAUTIONS

Other Handling and Storage Conditions: Store in tightly closed containers in a cool, dry place. Wash hands and face thoroughly
after handling and before eating.

Transportation Requirements:

DOT Class: Not classified
UN Number: N/C
IMCO Class: N/C


Prepared by: S. Dierks
Dated: March 1993

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