MATERIAL SAFETY DATA SHEET







I        PRODUCT IDENTIFICATION



Trade Name:       Selenium Chloride                                               Formula:          SeCl4

TSCA:             Listed in the EPA TSCA inventory                                CAS #:            10026-03-6





II       HAZARDOUS INGREDIENTS



                                             TLV: 0.2 mg/m3(Se)                   OSHA PEL: 0.2 mg/m3(Se)

Selenium Chloride %: 100



HMIS Hazard Rating: Health: 4                Flammability: 0             Reactivity: 0              Personal Protection: X





III      PHYSICAL DATA



                           288 oC (decomposes)                                                      205 oC (sublimes 170-196)

Boiling Point:                                                               Melting Point:

Reaction with Water:       Deliquescent, decomposes                          Density:               2.6

Solubility in Water:       Decomposes                                        Appearance:            White-yellow cubic crystals

Other Comments:            Insoluble in liquid bromine; decomposes by dry ammonia.





IV       FIRE AND EXPLOSION HAZARDS DATA



Flash Point (Method Used): N/A                                                    Autoignition Temperature: N/A

Flammability: Non-flammable                                                       Flammable Limits: Upper: N/A Lower: N/A



Extinguishing Media: Dry chemical, CO2 or graphite.

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: When heated to decomposition it emits toxic fumes of Se and Cl.





V        HEALTH HAZARD INFORMATION



Toxicity Data:    scu-gpg LD50: 19 mg/kgSe Data: orl-mus TDLO: 134 mg/kg

                  ihl-rat TDLO: 33 mg/kg/8Hivn-rat LD50: 6 mg/kg



Route(s) of Entry: Inhalation? Yes           Skin? Yes         Ingestion? Yes



Effects of Overexposure:



Inhalation: May cause sneezing, coughing, difficulty breathing, and irritation of the respiratory tract.

Dermal: May cause dermatitis.

Eye: May cause burning sensation, irritation, redness, and watering of the eyes if comes in contact.



Carcinogenicity: Experimental carcinogen.

NTP? No         IARC Monographs? No                   OSHA Regulated? No



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

EMERGENCY AND FIRST AID PROCEDURES:



SKIN: Brush material off skin. Wash affected area with soap and water. If irritation persists seek medical attention.

EYES: Immediately flush eyes, including under eyelids with large amounts of water for at least 15 minutes. Seek medical attention.

INGESTION: Give 1-2 glasses of milk or water and induce vomiting. Seek immediate medical attention.

INHALATION: Remove victim to fresh air. Administer oxygen if breathing is difficult. Seek immediate medical attention.





VI       REACTIVITY DATA



Stability: Stable

Incompatibility (Material to Avoid): No data



Hazardous Polymerization: Will not occur.

Hazardous Decomposition Products: Se, C12, Cl

Conditions to Avoid: Decomposes in moist air and water. Avoid heat, flame, and incompatible materials.





VII      SPILL OR LEAK PROCEDURES



Steps to Be Taken in Case Material Is Released or Spilled: Wear a self-contained breathing apparatus and full protective clothing.

Isolate the area where the spill occurred and insure that proper ventilation is available. Vacuum up spill using a high efficiency unit

and place in a container for proper disposal. Take care not to raise dust.



Waste Disposal: Consult State, Local or Federal EPA regulations for proper disposal.





VIII     SPECIAL PROTECTION INFORMATION



Eye Protection: Safety glasses.                                  Protective Gloves: Neoprene

Respiratory Protection: Wear NIOSH-approved dust-mist-fume cartridge respirator.



Ventilation: Local - Maintain exposure below TLV levels.                Mechanical: Not recommended

Special: Handle in a controlled environment.                            Other: N/A



Other Protective Equipment/Work Practices: Wear protective clothing to prevent contamination of skin and clothes.





IX       SPECIAL PRECAUTIONS



Precautions to Be Taken in Handling and Storing: Store in tightly closed containers in a cool, dry place. Wash hands and face

thoroughly after handling and before eating.





Prepared by:      S. Dierks

Dated:            May 1994