MATERIAL SAFETY DATA SHEET

I.   PRODUCT IDENTIFICATION

Manufacturer/Supplier:

ESPI Metals

1050 Benson Way, Ashland, OR 97520

Toll Free (800) 638-2581 * Fax (541) 488-8313

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Product Name:     Osmium IV Oxide

Formula:              OsO₂

CAS Number:       12036-02-1

II.   HAZARDOUS INGREDIENTS

Hazardous Component:  Osmium Oxide

Percent (%):                   0-100

OSHA/PEL:                      N/E or N/A

ACGIH/TLV:                    1.0 mg/m³

III.   PHYSICAL DATA

Boiling Point:                  N/E or N/A

Melting Point:                 Decomposes

Specific Gravity:            7.71 g/cc

Solubility in H₂O:            Slightly soluble

Appearance and Odor:   Black crystalline powder, odor of chlorine

IV.   FIRE AND EXPLOSION HAZARDS DATA

Flash Point:  N/A

Flammability:  Non flammable

Flammable Limits:  Lower:  N/A      Upper:  N/A

Extinguishing Media:  CO₂, Foam, dry powder.

Special Firefighting Procedures:  Firefighters must wear full face, self-contained breathing apparatus with full protective clothing to prevent contact with skin and eyes.

Unusual Fire and Explosion Hazards:  May emit toxic fumes upon decomposition.

V.   HEALTH HAZARD INFORMATION

Effects of Exposure:

To the best of our knowledge the acute and chronic toxicity of this substance is not fully known.  Oxidation of osmium compounds may form the volatile and highly irritating osmium (VIII) oxide.  Exposure may cause bronchitis and dermatitis.

Osmium compounds are generally considered to be poisonous.  Ocular disturbances are associated with exposure to OSO₄.  The oxide ion generally has a very low toxicity.

Acute Effects:

Inhalation:  Irritating to mucous membranes.

Ingestion:  May cause heavy metal poisoning.

Skin:  Irritating effect on skin.  Danger through skin absorption.

Eye:  Strong irritating effect.

EMERGENCY AND FIRST AID PROCEDURES:

INHALATION:  Supply fresh air.  If required, provide artificial respiration.  Keep patient warm.  Seek immediate medical advice.

INGESTION:  Seek immediate medical advice.

SKIN:  Immediately wash with soap and water and rinse thoroughly.  Seek immediate medical advice.

EYES:  Rinse opened eye for several minutes under running water.  Then consult a doctor.

VI.   REACTIVITY DATA

Stability:  Stable

Conditions to Avoid:  Extreme heat.

Incompatible Materials:  All oxidizers, acids, organic solvents.

Hazardous Decomposition Products:  OsO₄

Hazardous Polymerization:  Will not occur

VII.   SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled:  Wear protective equipment.  Keep unprotected persons away.  Ensure adequate ventilation.  Use a neutralizing agent.  Sweep up and place in airtight plastic container.

Waste Disposal Method:  Ship to precious metal refiner.  Dispose of in accordance with all State, Federal and Local regulations.

VIII.   SPECIAL PROTECTION INFORMATION

Respiratory Protection:  NIOSH/MSHA approved respirator.

Ventilation:  Fume hood

Protective Gloves:  Rubber for all contact

Eye Protection:  Goggles

Other Protective Equipment:  Normal labwear.

IX.   SPECIAL PRECAUTIONS

Precautions to Be Taken in Handling and Storage:  Keep container tightly sealed.  Store in cool, dry conditions in well sealed containers.  Ensure good ventilation at the workplace.  Open and handle container with care.

Work Practices:  Implement engineering and work practice controls to reduce and maintain concentration of exposure at low level.  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.

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:             Steve Dierks

Date:                    June 2004