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CAESIUM HYDROXIDEICSC: 1592
April 2006
CAS #: 21351-79-1Cesium hydrate
Cesium hydroxide
Caesium hydrate
UN #: 2682
EINECS #: 244-344-1

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. Contact with moisture or water may generate sufficient heat to ignite combustible materials.  Risk of explosion on contact with oxidizing agents.      In case of fire in the surroundings, use appropriate extinguishing media.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 

   
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Shortness of breath. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin Skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Severe deep burns.  Wear face shield.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Burning sensation. Shock or collapse.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Personal protection: chemical protection suit. Sweep spilled substance into plastic or glass containers. Wash away remainder with plenty of water. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 8; UN Pack Group: II 

STORAGE
Dry. Well closed. Separated from combustible substances, acids, strong oxidants, metals and food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
CAESIUM HYDROXIDE ICSC: 1592
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-YELLOW HYGROSCOPIC CRYSTALS. 

Physical dangers
 

Chemical dangers
Reacts violently with water. This generates heat. The substance is a strong base. It reacts violently with acid and is corrosive to metals. Attacks many metals. This produces flammable/explosive gas (hydrogen - see ICSC 0001). 

Formula: CsOH
Molecular mass: 149.91
Melting point: 272°C
Density: 3.68 g/cm³
Solubility in water, g/100ml at 15°C: 395 (very good) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by ingestion. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
TLV: 2 mg/m3, ppm, as TWA 

ENVIRONMENT
 

NOTES
Caesium hydroxide in solution: UN 2681; UN Hazard class:8; UN Packgroup: II,III; Transport Emergency Card: TEC (R)-80GC5-II+III. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations