Data

             Westco Chemicals, Inc.

                                                                              Sheet

   12551-61 Saticoy Street South - North Hollywood, CA 91605

      TEL:323- 877-0077 818-255-3655 FAX: 818-255-3650



                                        Material Safety Data Sheet

                                           Barium Carbonate





Suppliers Name: Westco Chemicals, Inc.

Address: 12551-61 Saticoy Street South

          North Hollywood, CA 9160

Telephone: 818-255-3655 or 323-877-0077



EMERGENCY TELEPHONE NUMBER: 800-424-9300 CHEMTREC





1. Identification



Product Name: Barium Carbonate

Chemical Name: Barium Carbonate

Formula: BaCO3

Molecular Weight: 197.35

CAS No.: 513-77-9



2. Composition / Information on Ingredients



Chemical Name: Barium Carbonate

CAS #: 513-77-9

ACGIH TLV: 0.5 mg/m³ for soluble Barium compounds as Barium (0.74 mg/m³ as BaCO3).

 (1992-1993)



3. Hazard Identification



Route of Exposure: Ingestion, Inhalation, Skin or Eye



Skin: Barium is not likely to penetrate intact skin; penetration through cuts may cause

symptoms of over-exposure. A slight irritation may result from the alkaline nature of the

product.



Eye: Particles in the eye may cause pain, tearing and irritation.



4. First Aid Measures



Inhalation: Flush mouth and nasal passages with water. Have victim drink solution of

 1 Tablespoon of Epson Salt (Magnesium Sulfate) or Glauber's Sulfate (Sodium Sulfate)

 dissolved in water. Call for medical attention.



Eyes: Flush eyes with water until irritation subsides. Get medical attention if necessary.

Skin: Wash with water and soap is available. Remove contaminated clothing and wash

before re-use.



Ingestion: Have victim drink solution of 1 Tablespoon of Epson Salt (Magnesium Sulfate) or

 Gluaber's Sulfate (Sodium Sulfate) dissolved in water. Induce vomiting if victim is

 completely conscious. Call for medical attention.



Regulatory / Carcinogenicity: Barium carbonate is not considered carcinogenic (1993

study of Barium Chloride showed no evidence).



Medical Conditions Aggravated by Exposure: Acute over-exposure will cause severe

abdominal pain, violent purging with watery bloody stools, vomiting, muscle twitching

and confusion, followed by muscle paralysis of the respiratory muscles, which may be

fatal.



5. Fire Fighting Measures



Common Extinguishing Methods: Foam or Water



Inappropriate Extinguishing Methods: NA



Specific Hazards: Will decompose releasing Carbon Dioxide gas at extremely high temperatures.



Protective Measures in case of Intervention: NA



Other Precautions: Limit water runoff if it is likely to contain suspended product.



6. Accidental Release Measures



Try to keep material dry. Prevent runoff from entering sewers or ditches connected with natural

waterways. Dispose of appropriately in compliance with local, state and federal laws and

regulations.



7. Handling and Storage



General storage conditions are not critical. Keep material dry. Store separate from acids.

Emptied containers may present a toxic hazard. Treat or dispose of empty containers

in compliance with local, state and federal laws and regulations.



8. Exposure Controls / Personal Protection



Engineering Controls: Control airborne concentrations below the exposure limit. Use only with

adequate ventilation.



Respiratory Protection: Use NIOSH approved dust mask.



Hand Protection: Wear impervious gloves.

Eye Protection: Wear safety glasses. Use chemical goggles if excessive dust is present.



Skin Protection: Cover exposed skin areas.



9. Physical and Chemical Properties



Appearance: Solid, white powder or granules



Odor: Usually odorless



pH: 9 (measures in a 1% suspension in water)



Boiling Point / Range : NA



Melting Point / Range: 1400 ºC (2552ºF) - near decomposition temperature.



Flash Point: NA



Flammability: NA

Lower Limit: NA

Upper Limit: NA



Autoignition Temperature: NA



Danger of Explosion: NA



Combustible Characteristics: NA



Vapor Pressure: NA



Vapor Density (air=1): 4.3



Specific Gravity (H2O=1): NA



Solubility:

Water Solubility: 0.02g/l

(Barium Chloride BaCl2 375 g/l)

(Barium Sulfate    BaSO4 0.002 g/l)



Viscosity: NA



Decomposition Temperature: See Melting Point / Range



Partition Coefficient p (n-octanol/water): NA



Other Data: NA

10. Stability and Reactivity



Stability: Stable under normal conditions



Conditions to Avoid: Heat



Materials to Avoid: Acids



Hazardous Decomposition Products: Carbon dioxide, soluble Barium salts



11. Toxicological Information



Acute Toxicity:

LD50-oral (rat): 630 mg/kg



Chronic Toxicity: Chronic over-exposure may lead to varying degrees of paralysis of the

extremities. A conditions known as "Bartosis" will be observed (x-ray of lungs will be

influenced). Symptoms of over-exposure will disappear with time as the body eliminates

Barium.



12. Disposal Considerations



Waste and Packaging Treatment: Dispose of in compliance with local, state and federal

laws and regulations.



13. Transport



UN No.: 1564



DOT Classification

DOT Proper Shipping Name: Barium compounds, n.o.s.

Labels Required: 6.1 (toxic)

Packing Group: PGIII

Hazard Class: NA



14. Regulatory Information



Authorized Limit Values:

TLV (ACGIH) - TWA: 0.5 mg/m³ for soluble Barium compounds; Barium carbonate is not

listed.





Creation Date: 9/17/01

Review Date: 6/25/07





   THE INFORMATION CONTAINED HEREIN IS TO OUR BEST KNOWLEDGE, CORRECT, BUT ALL RECOMMENDATIONS OR SUGGESTIONS ARE MADE WITHOUT GUARANTEE OR

  RESPONSIBILITY SINCE THE CONDITIONS OF USE ARE BEYOND OUR CONTROL. WE DISCLAIM ANY LIABILITY INCURRED IN CONNECTION WITH THE USE OF THESE DATA OR

   SUGGESTIONS. FURTHER, NOTHING CONTAINED HEREIN SHALL BE CONSTRUED AS A RECOMMENDATION TO USE ANY PRODUCT IN CONFLICT WITH EXISTING PATENTS.