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MATERIAL SAFETY DATA SHEET

I            PRODUCT IDENTIFICATION

Trade Name:      Yttrium Nitride                                                                           Chemical Family:             Metal Nitride

CAS #:                25764-13-0                                                                                  Formula:                           YN

II           HAZARDOUS INGREDIENTS

TLV (Units):      25 ppm (NH₃) 1 mg/m³ (Y)                                                        OSHA/PEL: 50 ppm (as NH₃) 1 mg/m³ (Y)

Percent:              100

HMIS Hazard Rating: Health: 2               Flammability: 1               Reactivity: 1      Personal Protection: J

III         PHYSICAL DATA

Boiling Point 760 mm Hg:             No Data                                                          Melting Point:                  No Data

Solubility in H₂O (%):                   Decomposes                                                   Appearance and Odor:    Black crystalline solid

Reaction with Water:                     Decomposes producing NH₃                          Density gm/cc:                  5.60

Vapor Pressure:                             N/A                                                                 % Volatiles by Weight:   N/A

IV         FIRE AND EXPLOSION HAZARDS DATA

Flash Point (Method): N/A                                                                                   Autoignition Temp: Unknown

Flammability: Hazard on contact with water.

Extinguishing Media: DO NOT USE WATER!!!!! Use dry chemical, CO₂.

Special Fire Fighting Procedures: Wear a self-contained breathing apparatus and full protective clothing to prevent contact with skin and eyes.

Unusual Fire & Explosion Hazards: Reacts in moist air to liberate NH₃.

V           HEALTH HAZARD INFORMATION

Routes of Entry: Inhalation, Skin, Ingestion

Toxicity Data: No data on this compound

NH₃ Data:          orl-rat LD50: 350 mg/kg                                                   ihl-cat LC50: 7 gr/m³/1H

                            ihl-hmn LCLO: 5000 ppm/5M                                                   ihl-hmn TCLO: 20 ppm

                            ihl-mus LC50: 4230 ppm/1H                                                     ihl-rat LC50: 2000 ppm/4H

                            orl-rat LD50: 7 gm/m³/1H                                                         urp -mam LDLO: 132 mg/kg

Y Data:               TDLO: 1300 mg/kg

Medical Conditions Generally Aggravated by Exposure: Respiratory, and skin disorders.

Carcinogenicity: None    NTP: No            IARC Monographs: No                OSHA: Yes

Effects of Overexposure (Acute and Chronic):

Inhalation: A respiratory irritant. Coughing, sneezing, difficulty breathing, headache and bronchitis. Prolonged exposure may cause lung granulomas.

Skin: Irritation, inflammation, redness possible. May burn wet skin.

Eye: Irritation, watering, redness possible. Excessive exposure may cause temporary blindness.

Other: Yttrium may cause delayed blood coagulation and liver damage. Yttrium and its compounds have caused pulmonary injury in test animals. Diffuse pulmonary fibrosis has been reported. As a corrosive substance, YN may cause mucous membrane and respiratory tract irritation, and aggravate pre-existing pulmonary disorders.

EMERGENCY AND FIRST AID PROCEDURES:

EYES: Flush with copious amounts of water for at least 15 minutes and seek medical attention immediately.

SKIN: Wash skin with mild soap and water. Seek medical attention.

INHALATION: Remove to fresh air. Seek medical attention immediately.

INGESTION: SEEK MEDICAL ATTENTION IMMEDIATELY. Give 1-2 cups of milk or water. DO NOT INDUCE VOMITING.

VI         REACTIVITY DATA

Stability: Unstable

Conditions Contributing to Instability: Water/moisture.

Incompatibilities: Water, strong acids, bases.

Hazardous Decomposition Products: NH₃, NOx upon heating to decomposition.

Conditions to Avoid: Humid atmospheres.

Hazardous Polymerization: Will not occur

VII        SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled: Wearing a self-contained breathing apparatus and full protective clothing, isolate the area where the spill occurred. Insure proper ventilation is available and that water/moisture are kept out of out of the area. Vacuum up the spill using a high efficiency unit and place in a container for proper disposal. Take care not to raise dust.

Waste Disposal Method: Disposal must be made in accordance with Federal, State and Local regulations.

VIII      SPECIAL PROTECTION INFORMATION

Respiratory Protection (Specify Type): NIOSH approved Dust, fume, mist cartridge respirator.

Ventilation: Local Exhaust: Maintain exposure below TLV.

Mechanical: Recommended                                                                                   Special: N/A

Protective Gloves: Neoprene                                                                                 Eye Protection: Safety Goggles

Other Equipment: Wear protective clothing to prevent contamination of skin and clothes.

IX         SPECIAL PRECAUTIONS

Other Handling and Storage Conditions:

♦            Store under dry, inert atmosphere.

♦            Store in tightly closed containers in a cool, dry place.

♦            Wash hands and face thoroughly after handling and before eating.

DOT/UN/IMCO Class: Not regulated.

Other: SPC, corrosive

              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:                  October 1992