Cesium hydroxide , 50 , 21351-79-1

CAS NO.：21351-79-1

Empirical Formula: CsHO

Molecular Weight: 149.91

MDL number: MFCD00149664

EINECS: 244-344-1

PRODUCT Properties

• Melting point: 272 °C(lit.)
• Density: 3.68 g/mL at 25 °C(lit.)
• solubility: Miscible with ethanol.
• form: Liquid
• pka: 11.6[at 20 ℃]
• color: Colorless
• Water Solubility: soluble
• Sensitive: Air Sensitive
• Merck: 13,2022
• Exposure limits: ACGIH: TWA 2 mg/m3; NIOSH: TWA 2 mg/m3
• Stability: Stable. Incompatible with acids. Absorbs carbon dioxide from the air.
• CAS DataBase Reference: 21351-79-1(CAS DataBase Reference)
• NIST Chemistry Reference: Cesium hydroxide(21351-79-1)
• EPA Substance Registry System: Cesium hydroxide (21351-79-1)

Description and Uses

Cesium hydroxide is a colorless-to-yellowcrystalline compound. It is often used in a water solution.Molecular weight=142.92; Specific gravity (H2O:1) 53.68; Freezing/Melting point=272℃. HazardIdentification (based on NFPA 704 M Rating System):Health 3, Flammability 0, Reactivity 0. Highly soluble inwater; solubility 395% at 15℃.

Cesium hydroxide is used in the preparation of porous cesium titanosilicates, which are potential ion-exchange materials utilized for radioactive wastes cleaning purpose. It is also involved in the preparation of other cesium salts. Further, it is used as an electrolyte in alkaline storage batteries and as a catalyst in organic synthesis. In addition to this, it is used in color photography.

Safety

• Symbol(GHS): GHS05,GHS07
• Signal word: Danger
• Hazard statements: H302-H314
• Precautionary statements: P280-P305+P351+P338-P310
• Hazard Codes: C
• Risk Statements: 22-35-34
• Safety Statements: 26-36/37/39-45-37/39-27-28
• OEB: B
• OEL: TWA: 2 mg/m3
• RIDADR: UN 2682 8/PG 2
• WGK Germany: 3
• F: 3
• TSCA: Yes
• HazardClass: 8
• PackingGroup: II
• HS Code: 28259090
• Hazardous Substances Data: 21351-79-1(Hazardous Substances Data)
• Toxicity: LD50 i.p. in rats: 100 mg/kg (Cochran)