ICSC 1592 - CESIUM HYDROXIDE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

CESIUM HYDROXIDE

ICSC: 1592
_{April 2006}

Cesium hydrate
Caesium hydroxide

CAS No: 21351-79-1
RTECS No: FK9800000
UN No: 2682

CsOH
Molecular mass: 149.91

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	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 substances.		In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION	Risk of explosion on contact with oxidants.		In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.

EXPOSURE
Inhalation	Cough. Shortness of breath. Sore throat.	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.	Face shield	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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	PACKAGING & LABELLING
Personal protection: P2 filter respirator for harmful particles. Chemical protection suit. Sweep spilled substance into plastic sealable containers. Wash away remainder with plenty of water.	UN classification UN Hazard Class: 8 UN Pack Group: II	Do not transport with food and feedstuffs.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-80GC6-II+III	Dry. Well closed. Separated from combustibles, acids, strong oxidants, metals, food and feedstuffs.

IMPORTANT DATA
Physical State; Appearance COLOURLESS TO YELLOW HYGROSCOPIC CRYSTALS. Chemical dangers Reacts violently with water, producing heat. The substance is a strong base, it reacts violently with acid and is corrosive to metals. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001). Occupational exposure limits TLV: 2 mg/m³ as TWA (ACGIH 2004). MAK not established.	Routes of exposure The substance can be absorbed into the body by ingestion. Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed. Effects of short-term exposure The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Melting point: 272°C Density: 3.68 g/cm³ Solubility in water, g/100 ml at 15°C: 395 (very good)

NOTES

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

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006

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Updated by AS. Approved by GS. Last update: 29.01.2008