Cesium Hydroxide
Title: Cesium Hydroxide
CAS Registry Number: 21351-79-1
Additional Names: Cesium hydrate
Molecular Formula: CsHO
Molecular Weight: 149.91
Percent Composition: Cs 88.66%, H 0.67%, O 10.67%
Line Formula: CsOH
Literature References: Prepd by electrolysis of Cs salts: Winslow et al., J. Phys. Colloid Chem. 51, 967 (1947); Jolibois, Berger, Compt. Rend. 224, 78 (1947). Alternate prepn: H. Jacobs, B. Harbrecht, Z. Naturforsch. B36, 270 (1981). Toxicity study: Cochran et al., Arch. Ind. Hyg. 1, 637 (1950).
Properties: White or yellowish, fused, very deliquescent, crystalline mass; strongly alkaline reaction. mp 272°. d 3.68. Corrosive! Sol in about 0.25 part water, much heat being evolved; sol in alcohol. Keep tightly closed. LD50 i.p. in rats: 100 mg/kg (Cochran).
Melting point: mp 272°
Density: d 3.68
Toxicity data: LD50 i.p. in rats: 100 mg/kg (Cochran)
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin, upper respiratory tract; eye and skin burns. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 56.
Use: In storage-battery electrolytes; as catalyst in the polymerization of cyclic siloxanes.

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