Cesium

Formula
Cs
Structure
Description
A soft metallic solid.
Uses
Substance is used in photoelectric cells, as a getterâ in vacuum tubes.

Registry Numbers and Inventories.
CAS
7440-46-2
EC (EINECS/ELINCS)
231-155-4
RTECS
FK9225000
RTECS class
Other
UN (DOT)
1407
Merck
12,2051
Beilstein/Gmelin
15188 (G)
Swiss Giftliste 1
G-8199
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
Cs(1+)
Formula mass
132.90
Melting point, °C
28.5
Boiling point, °C
705
Density
1.873 g/cm3
Solubility in water
May decompose

Hazards and Protection.
Storage
Keep under an argon blanket. Keep away from water. Water free area.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not allow water to get into the container because of violent reaction. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use only in a chemical fume hood.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Sulfur, oxidizing agents, acids, alcohols, halogens, plastics, water, oxygen.
Decomposition
Irritating and toxic fumes and gases.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Can burn in a fire, releasing toxic vapors. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. May ignite or explode on contact with steam or moist air. Extinguishing media: Do NOT use water directly on fire.
Fire potential
Produce flammable gases on contact with water.
Hazards
Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
 
Special
W

Health.
Poison_Class
2
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
May cause central nervous system effects. May cause cause autonomic disturbances, resulting in effects on the gastrointestinal tract and heart.
   Inhalation
May cause effects similar to those described for ingestion.
   Skin
No information regarding skin irritation and other potential effects was found.
   Eyes
Has been reported to be noninjurious when applied to rabbit eyes.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1407
Response guide
Hazard class
4.3
Packing Group
I
 
Std. Transport #
4916309