SECTION 1. IDENTIFICATION
Product Name: Cesium Oxide Powder
Product Number: All applicable American Elements product codes, e.g. CS-OX-02-P 02
, CS-OX-03-P 03
, CS-OX-04-P 04
, CS-OX-05-P 05
CAS #: 20281-00-9
Relevant identified uses of the substance: Scientific research and development
Supplier details:
American Elements
10884 Weyburn Ave.
Los Angeles, CA 90024
Tel: +1 310-208-0551
Fax: +1 310-208-0351
Emergency telephone number:
Domestic, North America: +1 800-424-9300
International: +1 703-527-3887
SECTION 2. HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW:
May cause skin irritation and/or dermatitis
Principle routes of exposure:
Skin
Inhalation:
May cause irritation of respiratory tract
Ingestion:
May be harmful if swallowed.
Skin contact:
May cause allergic skin reaction
Eye contact:
Avoid contact with eyes
Statements of hazard
MAY CAUSE ALLERGIC SKIN REACTION.
Statement of Spill or Leak - ANSI Label
Eliminate all ignition sources. Absorb and/or contain spill with inert materials (e.g., sand, vermiculite). Then place in appropriate container. For large spills, use water spray to disperse vapors, flush spill area. Prevent runoff from entering waterways or sewers.
SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS
Components
CESIUM OXIDE
CAS Number
20881-00-9
OSHA Exposure Limits:
None
SECTION 4. FIRST AID MEASURES
General advice:
In the case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Inhalation:
Move to fresh air. Call a physician immediately.
Skin contact:
Rinse immediately with plenty of water and seek medical advice
Ingestion:
Do not induce vomiting without medical advice.
Eye contact:
In the case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Protection of first-aiders:
No data available
Medical conditions aggravated by exposure:
None known
SECTION 5. FIREFIGHTING MEASURES
Suitable extinguishing media:
Use dry chemical, CO2, water spray or "alcohol" foam
Specific hazards:
Burning produces irritant fumes.
Unusual hazards:
None known
Special protective equipment for firefighters:
As in any fire, wear self-contained breathing apparatus pressure-demand, MSHA/NIOSH (approved or equivalent) and full protective gear
Specific methods:
Water mist may be used to cool closed containers.
Flash point: No data available
Autoignition temperature: No data available
NFPA rating:
NFPA Health: 1
NFPA Flammability: 1
NFPA Reactivity: 0
SECTION 6. ACCIDENTAL RELEASE MEASURES
Personal precautions:
Use personal protective equipment.
Environmental precautions:
Prevent product from entering drains.
Methods for cleaning up:
Sweep up and shovel into suitable containers for disposal.
SECTION 7. HANDLING AND STORAGE
Storage:
ROOM TEMPERATURE
Handling:
Use only in area provided with appropriate exhaust ventilation.
Safe handling advice:
Wear personal protective equipment.
Incompatible products:
Oxidising and spontaneously flammable products
SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Engineering measures:
Ensure adequate ventilation.
PERSONAL PROTECTIVE EQUIPMENT
Respiratory protection:
Breathing apparatus only if aerosol or dust is formed.
Hand protection:
Pvc or other plastic material gloves
Skin and body protection:
Usual safety precautions while handling the product will provide adequate protection against
this potential effect.
Eye protection:
Safety glasses with side-shields
Hygiene measures:
Handle in accordance with good industrial hygiene and safety practice.
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
Formula: Cs2O
Molecular weight: 281.8102
Melting point/range: No data available at this time.
Boiling point/range: No Data available at this time.
Density: No data available
Vapor pressure: No data available
Evaporation rate: No data available
Vapor density: No data available
Solubility (in water): No data available
Flash point: No data available
Autoignition temperature: No data available
SECTION 10. STABILITY AND REACTIVITY
Stability:
Stable under recommended storage conditions.
Polymerization:
None under normal processing.
Hazardous decomposition products:
Thermal decomposition can lead to release of irritating gases and Vapors such as carbon oxides.
Materials to avoid:
Strong oxidising agents
Conditions to avoid:
Exposure to air or moisture over prolonged periods.
SECTION 11. TOXICOLOGICAL INFORMATION
Product Information
Acute toxicity
Components
CESIUM OXIDE
RTECS Number: Not Available
Selected LD50s and LC50s: No data available
Chronic toxicity:
Chronic exposure may cause nausea and vomiting, higher exposure causes unconsciousness.
Local effects:
Symptoms of overexposure may be headache, dizziness, tiredness, nausea and vomiting.
Specific effects:
May include moderate to severe erythema (redness) and moderate edema (raised skin), nausea, vomiting, headache.
Primary irritation:
No data is available on the product itself.
Carcinogenic effects:
No data is available on the product itself.
Mutagenic effects:
No data is available on the product itself.
Reproductive toxicity:
No data is available on the product itself.
SECTION 12. ECOLOGICAL INFORMATION
Mobility: No data available
Bioaccumulation: No data available
Ecotoxicity effects: No data available
Aquatic toxicity: May cause long-term adverse effects in the aquatic environment.
SECTION 13. DISPOSAL CONSIDERATIONS
Waste from residues / unused products:
Waste disposal must be in accordance with appropriate
Federal, State, and local regulations. This product, if unaltered by use, may be disposed of by treatment at a permitted facility or as advised by your local hazardous waste regulatory authority. Residue from fires extinguished with this material may be hazardous.
Contaminated packaging:
Do not re-use empty containers
SECTION 14. TRANSPORT INFORMATION
DOT (US)
Not dangerous goods
IMDG
Not dangerous goods
IATA
Not dangerous goods
SECTION 15. REGULATORY INFORMATION
SARA 313 Notification:
The above is your notification as to the SARA 313 listing for this product(s) pursuant to Section 313 of Title III of the Superfund Ammendments and Reauthorization Act of
1986 and 40 CFR Part 372. If you are unsure if you are subject to the reporting requirements of Section 313, or need more information, please call the EPA Emergency Planning and Community
Right-To-Know Information Hotline: (800) 535-0202 or (202) 479-2499 (in Washington, DC or Alaska).
State Notification:
The above information is your notice as to the Right-to-Know listings of the stated product(s). Individual states will list chemicals for a variety of reasons including, but not limited to, the compounds toxicity; carcinogenic, tumorigenic and/or reproductive hazards; and the compounds environmental impact if accidentally released.
SECTION 16. OTHER INFORMATION
Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. American Elements shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. COPYRIGHT 1997-2018 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.
The cesium atom has a radius of 265 pm and a Van der Waals radius of 343 pm. Cesium is a member of the alkali group of 
Cesium's main commercial source is pollucite ore; however, it is also found in beryl, avogadrite, pezzottaite, and londonite. Cesium was discovered by Robert Bunsen and Gustav Kirchhoff in 1860 and first isolated by Carl Setterberg in 1882. In its elemental form, cesium has a silvery gold appearance. The word Cesium originates from the Latin word "caesius," meaning "sky blue," which refers to the vibrant blue lines in its spectrum.