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CAS No 21351-79-1 , cesium

  • Name: cesium
  • Synonyms: Cesium hydroxide (Cs(OH)); UN2681; UN2682; Cesium hydroxide dimer;cesium; EINECS 244-344-1; Caesium hydroxide; 21351-79-1;hydroxide;Cesium hydrate; CsOH;
  • CAS Registry Number:
  • Transport: UN 2682 8
  • Flash Point: °C
  • Safety Statements: R22;R35
  • Hazard Symbols: C: Corrosive;
  • Flash Point: °C
  • EINECS: 244-344-1
  • Molecular Weight: 149.912792
  • InchiKey: HUCVOHYBFXVBRW-UHFFFAOYSA-M
  • InChI: InChI=1S/Cs.H2O/h;1H2/q+1;/p-1
  • Risk Statements: S26;S27;S37/39
  • Molecular Formula: CsHO
  • Molecular Structure:CAS No:21351-79-1 cesium
References of cesium
Title: Cesium Hydroxide
CAS Registry Number: 21351-79-1
Synonyms: 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.