ELECTRONIC SPACE PRODUCTS INTERNATIONAL

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MATERIAL SAFETY DATA SHEET

I            PRODUCT IDENTIFICATION

Trade Name:      Gadolinium Oxysulfide: Terbium Activated                              Formula:            Gd₂O₂S:Tb

CAS #:                68609-43-8

Synonyms:          Phosphor 1820, 2611, 2612, 2614, 2615, 2617, 2618. Phosphor 2617 Gd₂O₂S:Tb

II           HAZARDOUS INGREDIENTS

Gadolinium Oxysulfide: Terbium Activated: Percent by Weight: 100

This material consists of approximately 99% Gadolinium Oxysulfide. Neither a PEL or TLV has been established for Gadolinium compounds.

III         PHYSICAL DATA

Boiling Point:                   N/A                                                                               Vapor Density (Air=1):                  N/A

% Volatiles by Weight:   0                                                                                    Specific Gravity (H₂O=1):             7.4

Appearance and Odor:    White powder, No odor.                                               Solubility in H₂O:                           Insoluble

IV         FIRE AND EXPLOSION HAZARDS DATA

Flash Point (Method Used): N/A                                                                          Autoignition Temperature: N/A

Flammability: Non-flammable.                                                                             Flammable Limits: Upper: N/A  Lower: N/A

Extinguishing Media: No fire hazard. Use extinguishing agents suitable for the surrounding fire.

Special Fire Fighting Procedures: Toxic gases/fumes may be evolved in a fire situation. Fire fighters should wear self-contained breathing apparatus.

Unusual Fire & Explosion Hazard: None

V           HEALTH HAZARD INFORMATION

Route(s) of Entry: Material can be inhaled, swallowed or come in contact with the skin or eyes.

Effects of Over Exposure: There are no reports in the literature of adverse effects attributed to Gadolinium Oxysulfide.

EMERGENCY AND FIRST AID PROCEDURES:

EYES: If irritation occurs, flush eyes, including under the eye lids, with copious amounts of water. If irritation persists, seek medical attention.

SKIN: If irritation occurs, wash affected area with mild soap and water. If irritation persists, prevent further contact and seek medical attention.

INHALATION: If irritation or other symptoms occur, remove from exposure. Seek medical attention.

INGESTION: If substantial quantities are swallowed, give person (if conscious) a large quantity of water to drink, induce vomiting and seek medical attention.

VI         REACTIVITY DATA

Stability: Stable at room temperature.

Incompatibility (Material to Avoid): Contact with acids generates hydrogen sulfide gas.

Hazardous Decomposition Products: Oxides of Sulfur, Hydrogen Sulfide.

Hazardous Polymerization: Will not occur.

Conditions to Avoid: N/A

VII        SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled: Ventilate area of spill. Clean-up using methods which avoid dust generation such as vacuuming (with appropriate filter to prevent airborne dust levels which exceed the PEL or TLV), Wet dust mop or wet clean-up. If airborne dust is generated, use an appropriate NIOSH approved respirator.

Waste Disposal Method: Dispose of in accordance with applicable government regulations.

VIII      SPECIAL PROTECTION INFORMATION

Respiratory Protection (Specify Type): Use a appropriate NIOSH approved respirator if airborne dust concentrations exceed the TLV or PEL. All appropriate requirements set forth in 29 CFR 1910.134 should be met.

Ventilation: Local exhaust ventilation is recommended to minimize airborne dust exposures.

Protective Gloves: Gloves are recommended when prolonged or repeated contact is likely.

Eye Protection: Safety glasses or goggles are recommended.

Other Protective Equipment/Work Practices: N/A

IX         SPECIAL PRECAUTIONS

Precautions to Be Taken in Handling and Storage: Maintain good housekeeping procedures to prevent accumulation of dust. Use clean-up methods which minimize dust generation such as vacuuming or wet clean-up. If airborne dust is generated, use an appropriate NIOSH approved respirator.

Other Precautions: Wash thoroughly after handling and before eating or smoking and at the end of the work shift. Do not shake clothing or other items to remove dust. Use a vacuum. Avoid dust inhalation and direct skin contact. Do not ingest.

              The above information is believed to be correct, but does not purport to be all inclusive and shall be used only as a guide. ESPI shall not be held liable for any damage resulting from handling or from contact with the above product.

Issued By:           S. Dierks

Dated:                  September 1993