MATERIAL SAFETY DATA SHEET







I        PRODUCT IDENTIFICATION



Trade Name:       Gallium Telluride GaTe, pieces                                  Chemical Family:            Metal telluride

Synonyms:         Gallium telluride, gallium monotelluride                        Formula:                    GaTe

CAS #:            12024-14-5                                                      Molecular Weight:           197.32





II       HAZARDOUS INGREDIENTS



Hazardous Components:               OSHA PEL:          ACGIH TLV:        Other limits:     Percentage:

                                    .1 mg Te/m3        .1 mg Te/m3

Gallium telluride                                                        N/E               0.0-100.0



SEC. 302 (EHS): No         SEC. 304 RQ: No             SEC. 313: No



HMIS Ratings (0-4): Health: 4 Flammability: 0            Reactivity: 0

HMIS Protective Equipment: Goggles, gloves, apron, and respirator





III      PHYSICAL DATA



                                                                                                              822.0-826.0 oC

Boiling Point:                      N/E or N/A                                    Melting Point:

Physical State:                     Solid                                         Evaporation Rate:           N/A

                                    5.44 gm/cc at 25.0 oC

Specific Gravity (H2O=1):                                                         Vapor Density (Air=1):      N/A

Vapor Pressure (mm Hg):             N/A                                           Solubility in Water:        N/E

Appearance and Odor:                Black pieces, no odor.                        % Volatile:                 N/E or N/A





IV       FIRE AND EXPLOSION HAZARDS DATA



Flash Point: N/E or N/A                                                           Method Used: Non-flammable

Flammable Limits: LEL: N/A          UEL: N/A



Extinguishing Media: USE: Not applicable. Use suitable extinguishing media for surrounding materials an type of fire.

Special Fire Fighting Procedures: Firefighters must wear full face, self-contained breathing apparatus with full protective clothing

to prevent contact with skin and eyes. Fumes from fire are hazardous. Isolate runoff to prevent environmental pollution.



Unusual Fire & Explosion Hazards: When heated to decomposition, gallium telluride emits toxic fumes of tellurium.





V        HEALTH HAZARD INFORMATION



Routes of Entry: Inhalation, Skin, Eyes, Ingestion



Health Hazards (Acute and Chronic):



         To the best of our knowledge the chemical, physical and toxicological properties of gallium telluride have not been thor-

oughly investigated and recorded.



         Elemental tellurium has relatively low toxicity. It is converted in the body to dimethyl telluride which imparts a garlic-like

odor to breath and sweat. Heavy exposures may, in addition, result in headache, drowsiness, metallic taste, loss of appetite, nausea,

tremors, convulsion, and respiratory arrest (Sax, Dangerous Properties of Industrial Materials, eighth edition).

Inhalation: Acute: SEVERE IRRITANT AND CORROSIVE. May cause irritation to respiratory system, a dry mouth, garlic odor

to breath, sweat and urine.

Chronic: May cause anorexia, nausea, depression, somnolence and pulmonary fibrosis.



Ingestion: Acute: SEVERE IRRITANT AND CORROSIVE. May cause a dry mouth, suppression of sweat, garlic odor to breath

and urine.

Chronic: May cause anorexia, nausea, depression and somnolence.



Skin: Acute: SEVERE IRRITANT AND CORROSIVE. May cause irritation and itching.

Chronic: May cause dermatitis and depression of bone marrow function.



Eye: Acute: SEVERE IRRITANT AND CORROSIVE.

Chronic: No chronic health effects recorded.



Medical Conditions Generally Aggravated by Exposure: Pre-existing skin disorders

Target Organs: May affect the skin and central nervous system.



Carcinogenicity: NTP? No        IARC Monographs? No OSHA Regulated? No

Recommended Exposure Limits: See “Section II�

LD50/LC50: No toxicity data recorded



Signs and Symptoms of Exposure:



Inhalation: May cause a red, dry, burning throat, coughing, dry mouth, garlic-like odor to breath, sweat and urine, loss of appetite,

sleepiness and nausea.

Ingestion: May cause a dry, burning mouth, garlic-like odor to breath and urine, loss of appetite, sleepiness and nausea.

Skin: May cause redness, inflammation, chemical burns and watering.

Eye: May cause redness, itching, inflammation, chemical burns and watering.



EMERGENCY AND FIRST AID PROCEDURES:



INHALATION: Remove victim to fresh air; keep warm and quiet; give oxygen if breathing is difficult and seek medical attention

immediately.

INGESTION: Give 1-2 glasses of milk or water and induce vomiting; seek medical attention immediately. Never induce vomiting

or give anything by mouth to an unconscious person.

SKIN: Remove contaminated clothing; brush material off skin; wash affected area with mild soap and water; seek medical attention

immediately.

EYE: Flush eyes with lukewarm water, lifting upper and lower eyelids, for at least 15 minutes. Seek medical attention immediately.





IV       REACTIVITY DATA



Stability: Stable

Conditions to avoid (Instability): None

Incompatibility Materials to Avoid: None recorded



Hazardous Decomposition or Byproducts: Fumes of tellurium

Hazardous Polymerization: Will not occur

Conditions to Avoid Hazardous Polymerization: None

VII      SPILL OR LEAK PROCEDURES



Steps to Be Taken in Case Material Is Released or Spilled: Wear appropriate respiratory and protective equipment specified in

Section VIII - Special Protection Information. Isolate spill area and provide ventilation. Vacuum up spill using a high efficiency

particulate absolute (HEPA) air filter and place in a closed container for proper disposal. Take care not to raise dust.



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

Hazard Label Information: Store in a cool, dry place in a tightly sealed container. Wash thoroughly after handling.

Precautions to Be Taken in Handling and Storing: None





VIII     SPECIAL PROTECTION INFORMATION



Respiratory Protection (Specify Type): NIOSH approved dust, mist, vapor cartridge respirator.

Ventilation: Local Exhaust: To maintain concentration at or below PEL, TLV          Other: None

Mechanical (General): Not recommended                                               Special: None



Protective Gloves: Rubber                                                              Eye Protection: Safety goggles

Other Protective Clothing or Equipment: Protective gear suitable to prevent contamination.

Work/Hygienic/Maintenance Practices: 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.





IX       ADDITIONAL COMMENTS



        Some of the chemicals listed herein are research or experimental substances which may be toxic, as defined by various

governmental regulations. n accordance with Environmental Protection Agency regulations and Toxic Substance Control Act

(TSCA), these materials should only be handled by, or under the direct supervision of, a “technically qualified individual�, as defined

in 40 CFR 710.2(aa).



         The above information is accurate to the best of our knowledge. However, since data safety standards, and government

regulations are subject to change, and the conditions of handling and use or misuse are beyond our control, ESPI MAKES NO

WARRANTY, EITHER EXPRESSED OR IMPLIED, WITH RESPECT TO THE COMPLETENESS OR CONTINUING ACCU-

RACY OF THE INFORMATION CONTAINED HEREIN, AND DISCLAIMS ALL LIABILITY FOR RELIANCE THEREON.

Users should satisfy themselves that they have all current data relevant to their particular use.





Prepared by:      S. Dierks

Dated:            December 1994