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MATERIAL SAFETY DATA SHEET

I            PRODUCT IDENTIFICATION

Trade Name:      Calcium Oxide                                                                            Formula:                           CaO

Synonyms:          Lime unslaked, Lime burnt, Quicklime, Calx                             Chemical Family:             Inorganic oxide

CAS #:                1305-78-8

II           HAZARDOUS INGREDIENTS

%: 100                                            PEL: 5 mg/m³                                                             TLV: 2 mg/m³

III         PHYSICAL DATA

Boiling Point:                   2850 ^oC                                                                         Melting/Freezing Point:  2580 ^oC

Density gm/cc:                  3.32 - 3.35                                                                     % Volatile:                       NA

Solubility in H₂O:            Hydrates to form Ca(OH)₂, exothermic reaction.         Specific Gravity:              3.37

Evaporation Rate:           NA                                                                                Vapor Pressure:               NA

Appearance and Odor:    White or grayish-white powder.

Other Comments:            Readily absorbs CO₂ and H₂O from air.

IV         FIRE AND EXPLOSION HAZARDS DATA

Flash Point (Method used): Non-Flammable                                                       Autoignition Temperature: N/A

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

Extinguishing Media: Not combustible but contact with water or moisture may generate sufficient heat to ignite combustible materials. If involved in a fire, do not use water. Use carbon dioxide, dry chemical extinguishing agents, dry sand, or dry ground dolomite.

Special Fire Fighting Procedures: Not considered to be an explosion hazard. The combination of calcium oxide and water at high temperatures may be explosive. Use normal procedures which include wearing a NIOSH/MSHA approved self-contained breathing apparatus, flame and chemical resistant clothing; hats, boots, and gloves. If without risk remove material from fire area.

V           HEALTH HAZARD INFORMATION

Permissible Exposure Limit: TLV = 2 mg/m³ for CaO                                       OSHA PEL =5 mg/m³.

Animal Toxicity: LD50: No Data               LC50: No data                  Other: No Data

Corrosivness: Skin and eye. Reversible.

Sensitization: None

Effects of Over Exposure: Irritation: Skin and eye. Moderate. Mucous membranes.

Eye Contact: Severe irritant, may damage eye tissues. Causes redness, tearing, blurred vision and pain.

Ingestion: May attack the esophagus. Abdominal pain, nausea and vomiting may result. May cause serious alkali burns in the mouth and throat.

Lung Effects: Severe upper respiratory tract irritation. Ulceration and perforation of the nasal septum may occur from extended exposure. May aggravate pre-existing lung diseases.

Other: As a corrosive substance, CaO can cause severe G.I. tract injury. A skin irritant and corrosive substance to the skin. Can produce burns and dermatitis after prolonged contact.

Chronic Effects: Inhalation: Chronic inhalation of dust may cause inflammation of the respiratory passages, ulcers of the mucous membranes and possible perforation of the nasal septum.

EMERGENCY AND FIRST AID PROCEDURES:

EYES: Flush eyes with plenty of water for at least 15 minutes. Call a physician.

SKIN: Remove contaminated clothing, flood skin large amounts of water. If irritation persists seek medical attention.

INHALATION: Remove from area of exposure. Obtain medica attention.

INGESTION: Do not induce vomiting. Give large amounts of water or milk if available. Get medical attention as needed.

VI         REACTIVITY DATA

Stability: Stable

Conditions Contributing to Instability: Air oxidation, moisture.

Incompatibility (Material to Avoid): Water, acids, humid air, hydrogen fluoride, phosphorus pentoxide, interhalogens, boric acid, steam, many organic substances.

Hazardous Decomposition Products: CaO

Hazardous Polymerization: Will not occur.

Conditions to Avoid: Heat, sparks and open flame.

VII        SPILL OR LEAK PROCEDURES

Steps to Be Taken in Case Material Is Released or Spilled: Wearing full protective equipment, cover spill with dry sand or vermiculite. Mix well and carefully transfer to a container.

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

VIII      SPECIAL PROTECTION INFORMATION

Respiratory Protection (Specify Type): High efficiency particulate respirator.

Ventilation: Laboratory Fume Hood acceptable. Glove bag or box with dry inert atmosphere preferred.

Protective gloves: Rubber

Eye Protection: ANSI approved safety goggles with full face shield.

Other Protective equipment: Prevent skin contact and clothing contamination.

IX         SPECIAL PRECAUTIONS

Other Handling and Storage Conditions: Store in a cool, dry place in tightly closed containers. Wash hands thoroughly after handling. Do not rub breathe dust, vapor, mist, gas. Do not get in eyes, on skin or clothing. Empty container may contain hazardous residues. Irritant.

Other Precautions: Lab coat and apron, flame and chemical resistant coveralls, eyewash capable of sustained flushing, safety drench shower and hygienic facilities for washing.

Warning: Burns skin, eyes, and throat.

              Employers should use this information only as a supplement to other information gathered by them, and should make independent judgement of suitability of this information to ensure proper use and protect the health and safety of employees. This information is furnished without warranty, and any use of the product not in conformance with this MSDS, or in combination with any other product or process, is the responsibility of the user.

Issued By:           S. Dierks

Dated:                  May 1995