ELECTRONIC SPACE PRODUCTS INTERNATIONAL
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MATERIAL SAFETY DATA SHEET
I PRODUCT IDENTIFICATION
Cesium Cs
Trade Name: Form ula:
7440-4 6-2 Alkali Metal
CAS N umber: Ch em ical Fam ily:
II HAZAR DOUS INGRED IENTS
Hazardous Component % OSHA/PEL ACGIH/TLV DO T H azard Cla ss
Cesium 0-100 No data No data Flam ma ble Solid
SARA Title 313: Not Listed TSCA Inventory: Listed
III PHYSICAL DATA
682 oC 28 oC
Boiling Point: Melting Point:
Density, @ 20 oC: Density, @ 40 oC:
1.892 g/cc (Solid) 1.82 g/ml (Liquid)
1.33 hPa (279 oC) Reacts violently
Vapor Pressure: Solubility in H 2O:
Shiny bronze-colored metal, no odor No data
Appearance and Odor: % V olatiles:
IV FIRE AND EXPLOSION H AZARDS DATA
Flash Point: N/A Autoignition Temperature: No data
Explosive Lim its: Lower: No data Upper: No data
Extingu ishing Media: DO NOT USE WAT ER. Use class D metal fire agent, dry salt or sand.
Special Fire Fighting Procedures: Wear pressure demand self-contained breathing apparatus with full protective clothing. Burning
releases corrosive or highly irritating fumes and smok e. Ventilate area. Highly flammable. Material readily ignited with flame,
spark s, friction or he at.
Unusual Fire and Explosion Hazards: If involved in a fire, burning metal may produce severely corrosive fumes of cesium oxide
and hydroxide. Cesium reacts violently with water, liberating and igniting hydrogen, perhaps explosively. Cesium may ignite on
con tact with air. Py rophoric metal.
V HEALTH HAZARD INFORMATION
Effects of Exposure:
Cesium is highly reactive, especially with moisture. Extremely corrosive to tissue. If cesium ignites, it will cause thermal
burns. The metal rapidly forms caustic and highly corrosive alkali hydroxide with evolution of heat. Severe thermal and chemical
burns w ill result at ev ery p oint o f huma n contact.
Cesium compo unds may cause hyper-irritability, including spasms, dizziness, abdominal cramps, vomiting, diarrhea,
convulsions and collapse. Chronic ingestion of cesium has been fatal to laboratory animals, possibly due to the replacement of
potassium . Chron ic expo sure also can have b lood an d neu rom uscular effe cts.
Acute E ffects:
Inhalation: Inhalation is not a likely mode of entry.
Ingestion: Ingestion w ill cause burns an d perforations o f the gastroin testinal tract.
Skin : Seve re thermal burns, co rrosio n and ulceration of the skin m ay occur on direct contact.
Eye: Seve re thermal burns, co rrosio n and ulceration of the ey es m ay occur on direct contact.
Chro nic Effects: No info rmation available on long-term chron ic effects.
Carcino genicity: NTP: No IARC: No OSHA: No
EMERG ENCY AND FIRST AID PROCEDURES:
INHALATION: (For dust or fume) Remove victim to fresh air. Closely monitor the victim for signs of respiratory problems, such
as difficulty in breathing or coughing. In such cases seek imm ediate medical attention.
INGESTION: Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce
vom iting only if d irected by m edica l perso nne l.
SK IN: Immediately shake or brush any material from skin, remove any contam inated clothing, then flush skin with plenty of water
for at least 15 minutes. Wash clothing and thoroughly clean shoes before reuse. CALL A PH YSICIAN IN ALL CA SES.
EYE: Imm ediately flush eyes with plenty of water for at least 15 minutes, holding eyes open. Get imm ediate medical attention.
VI REACTIVITY DATA
Stability: Wa ter sensitive, py rophoric
Co nditio ns to Av oid: Contact with water or air.
Incompatibility (Materials to Avoid): Water, alcohols, oxid izers, halogens, oxy gen, carb on dioxide, ha logenated halo carbons,
sulfur, pho sphorus, and m ineral acids.
Haz ardous D ecomposition Produc ts: Flamma ble hydroge n with m oisture, caustic oxide with air.
Hazardous Polymerization: No hazardous polymerization
VII SPILL OR LEAK PROC EDURES
Steps to be Taken in Case Material is Released or Spilled: Wear protective equipm ent. Keep unp rotected persons away. En sure
adequate ven tilation. Keep away from ignition sou rces. Pick up mec hanically. Do no t flush with w ater or aqu eous clea nsing ag ents.
Waste Disposal Method: Material sho uld be d isposed o f in accord ance w ith local, state and fed eral regulation s.
VIII SPECIAL PROTECTION INFORMATION
Respiratory Protection: If ventilation is not available a respirator should be worn.
Ventilation: Handle in an efficient fume hood.
Protective Gloves: Rubber gloves
Eye Protection: Chemical splash proof goggles
Personal Protective Equipment: Long -sleeved fire retardant lab coat and pants w ithout cuffs.
IX SPECIAL PRECAUTIONS
Precautions to Be Taken in Handling and Storage: Handle and store in a tightly sealed container under an inert atmosphere of
argon. Protect from humidity and water. Keep ignition sources away.
-Cesium 2-
Hygienic Practices: Do not get in eyes, on skin, on clothing. Wea r recomm ended pro tective gear.
Wo rk Practices: Keep away from air, water, and incompatible materials. Handle under vacuum or inert gas atmosphere in dry
equipment. Keep container tightly closed. Dispose of all reaction residues immediately. Extinguisher should be readily available.
Engineering Co ntro ls: A dry metal pan of sufficient size to contain the amount of metal being used should be positioned to catch
any spill during handling. Provide a steel pan or steel curbing and flooring under equipment used to handle cesium. No sprinkler
system should be installed in area and floor drains should be covered and not trapped. An exhaust fan is recommended to remove
fumes in case of fire.
The info rmation herein is believed to be accu rate an d reliab le as of the date comp iled. H ow ever, ESPI m akes no representation,
warranty or g uarantee o f any kind with respect to the informa tion o n this d ata she et or an y use of the produc t based upo n this
information.
Issued by: S. Dierks
Date: December 2002
-Cesium 3-
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