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MATERIAL SAFETY DATA SHEET

I            PRODUCT IDENTIFICATION

Trade Name:      Barium Sulfide                                                                            Formula:            BaS

Synonyms:          Barium monosulfide, black ash                                                   CAS #:                21109-95-5

II           HAZARDOUS INGREDIENTS

Hazardous Components     %            OSHA/PEL        ACGIH/TLV               Sec. 302               Sec. 304               Sec. 313

Barium Sulfide                      0-100      0.5mg (Ba)/m³    0.5mg (Ba)/m³             No                       No                       Yes

HMIS Ratings: Health: 4 Flammability: 3       Reactivity: 2      Protective Equipment: J: goggles, gloves, apron, respirator

III         PHYSICAL DATA

Boiling Point:                   N/E or N/A                                                                   Melting Point:                  1200 ^oC

Specific Gravity:              4.25 at 15 ^oC                                                                 Vapor Pressure:               N/E

Vapor Density:                 N/A                                                                               Solubility in H₂O:            Decomposes

Appearance and Odor:    Heavy grayish-white or pale yellow, rotten egg odor.  % Volatiles:                     N/E or N/A

IV         FIRE AND EXPLOSION HAZARDS DATA

Flash Point: N/A                                                                                                    Autoignition Temperature: N/E

Flammable Limits: Upper: N/E   Lower: N/E                                                   

Extinguishing Media: Use a class D or other suitable metal extinguishing agent. DO NOT USE WATER.

Special Fire Fighting Procedures: Firefighters must wear full face, self-contained breathing apparatus with protective clothing to prevent contact with skin and eyes. Fumes from fire are hazardous. Isolate runoff to prevent environmental pollution.

Unusual Fire & Explosion Hazard: Flammable by spontaneous chemical reaction, air, moisture or acid fumes. Oxidizes in dry air. When heated to decomposition, barium sulfide may emit toxic fumes of oxides of sulfur. Reacts with water, moisture or steam to evolve toxic and flammable hydrogen sulfide. May ignite violently on contact with powerful oxidizing agents. May react violently with phosphorus (V) oxide. Mixtures with lead dioxide, potassium chlorate or potassium nitrite explode when heated.

V           HEALTH HAZARD INFORMATION

Effects of Exposure:

              To the best of our knowledge the chemical, physical and toxicological properties of barium sulfide have not been thoroughly investigated and recorded.

              Barium compounds may cause severe gastroenteritis, including abdominal pain, vomiting and diarrhea, tremors, faintness, paralysis of the arms and legs, and slow or irregular heartbeat. Severe cases may produce collapse and death due to respiratory failure. Soluble barium compounds are more likely to cause these effects than insoluble compounds. Inhalation of fumes may cause sore throat, coughing, labored breathing, and irritation of the respiratory tract as well as the above symptoms.

              Sulfides have variable toxicity. The alkaline sulfides (potassium, calcium, ammonium, and sodium) are similar in action to the alkalies. They cause softening and irritation of the skin. If ingested, they are corrosive and irritating through the liberation of hydrogen sulfide and free alkali (Sax, Dangerous Properties of Industrial Materials, eighth edition)

Acute Effects:

Inhalation: SEVERE IRRITANT AND CORROSIVE. May cause irritation to the upper respiratory system, dizziness, nausea, vomiting, colic, diarrhea, rapid respiration, high blood pressure, irregular heart action, convulsions, paralysis, and acute barium poisoning.

Ingestion: SEVERE IRRITANT AND CORROSIVE. May cause severe irritation to the gastrointestinal tract, vomiting, colic, diarrhea, slow irregular pulse, transient hypertension, convulsions, tremors, muscular paralysis, and acute barium poisoning.

Skin: SEVERE IRRITANT AND CORROSIVE to moist skin. May cause softening and irritation.

Eye: SEVERE IRRITANT AND CORROSIVE.

Chronic Effects:

Inhalation: May cause pulmonary edema and chronic barium poisoning.

Ingestion: May cause chronic barium poisoning.

Skin: May cause dermatitis.

Eye: May cause corneal opacity and blindness.

Target Organs: May affect the upper respiratory system, central nervous system, heart, skin and eyes.

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

Carcinogenicity: NTP: No           IARC: No          OSHA: No

EMERGENCY AND FIRST AID PROCEDURES:

INHALATION: Remove from exposure; keep warm and quiet; give oxygen if breathing is difficult and seek medical attention immediately.

INGESTION: Give 1-2 glasses of milk or water; DO NOT induce vomiting; seek medical attention immediately.

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

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

VI         REACTIVITY DATA

Stability: Stable

Conditions to Avoid: None

Incompatibility (Material to Avoid): Acids, water, moisture, steam, phosphorus (V) oxide, lead dioxide, potassium chlorate and potassium nitrite.

Hazardous Decomposition Products: Hydrogen sulfide and oxides of sulfides.

Hazardous Polymerization: Will not occur.

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. Isolate spill area, provide ventilation and extinguish sources of ignition. Vacuum up spill using a high efficiency particulate absolute (HEPA) air filter and place in a closed container for proper disposal. Use non-sparking tools. Take care not to raise dust.

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

VIII      SPECIAL PROTECTION INFORMATION

Respiratory Protection (Specify Type): Wear appropriate NIOSH/MSHA-approved dust, mist, vapor cartridge respirator.

Ventilation: Handle in a controlled atmosphere in an inert gas such as argon. Use local exhaust to maintain concentration at or below the PEL, TLV.

Protective Gloves: Rubber gloves.

Eye Protection: Safety goggles

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

IX         SPECIAL PRECAUTIONS

Precautions to Be Taken in Handling and Storage: Store in a cool, dry area. Store in a tightly sealed container. Wash thoroughly after handling. Store in an inert atmosphere.

Other Precautions: Barium sulfide reacts with water, moisture and steam. Handle and store in a controlled environment and an inert gas, such as argon.

Work 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. Maintain eyewash capable of sustained flushing, safety drench shower and facilities for washing.

DOT Regulations:

Hazard Class:                   4.3

Identification Number:    UN3134

Packing Group:                III

Proper Shipping Name:   Water-reactive solid, toxic, n.o.s. (barium sulfide)

              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

Date:                    August 2005