Cesium hydrate

CESIUM HYDRATE (21351-79-1) An extremely strong base. Violent reaction with acids, acetaldehyde, 2-butyne-l,4-diol, epichlorohydrin, glycidol. Incompatible with organic anhydrides, acrylates, alcohols, aldehydes, alkylene oxides, substituted allyls, cellulose nitrate, cresols, caprolactam solution, ethylene dichloride, isocyanates, ketones, glycols, nitrates, phenols, tyrothricin, vinyl acetate. Exothermic decomposition with maleic anhydride. Increases the explosive sensitivity of nitromethane. Attacks metals, including aluminum, copper, lead, tin, zinc. 

Caesium hydroxide Caesium hydroxide, solution Cesium hydrate Cesium hydroxide Cesium hydroxide (Cs(OH)) EINECS 244-344-1 NSC 121987 UN2681 UN2682. Electrolyte in alkaline storage batteries (especially at subzero temperatures), polymerization catalyst for siloxanes. Yellow-white crystals mp = 272° d = 3.68 LDso (rat ip) = 100 mg/kg. Atomergic Chemetals Cabot Carbon Ltd. Cerac Noah Chem. Sigma-Atdrich Fine Chem. 

Synonyms/Trade Names Cesium hydrate, Cesium hydroxide dimer ... 

Cesium hydroxide (cesium hydrate [CAS 21351-79-1]) Corrosive (see p 157). Highly irritating upon direct contact severe burns may result. Dusts are irritating to eyes and respiratory tract. 2 mg/m Colorless or yellow crystals that absorb moisture. Negligible vapor pressure. 

Cesium hydrate. See Cesium hydroxide Cesium hydroxide... 

Synonyms Cesium hydrate Cesium hydroxide dimer Cesium hydroxide, solid Cesium hydroxide, sol n. 

Cesium, an alkali metal, occurs in lepidolite, pollucte (a hydrated silicate of aluminum and cesium), and in other sources. One of the world s richest sources of cesium is located at Bernic Lake, Manitoba. The deposits are estimated to contain 300,000 tons of pollucite, averaging 20% cesium. 

Iodine is only slightly soluble in water and no hydrates form upon dissolution. The solubiHty increases with temperature, as shown in Table 2 (36). Iodine is soluble in aqueous iodide solutions owing to the formation of polyiodide ions. For example, an equiHbrium solution of soHd iodine and KI H2O at 25°C is highly concentrated and contains 67.8% iodine, 25.6% potassium iodide, and 6.6% water. However, if large cations such as cesium, substituted ammonium, and iodonium are present, the increased solubiHty may be limited, owing to precipitation of sparingly soluble polyiodides. Iodine is also more... 

Group 13 (IIIA) Perchlorates. Perchlorate compounds of boron and aluminum are known. Boron perchlorates occur as double salts with alkah metal perchlorates, eg, cesium boron tetraperchlorate [33152-95-3] Cs(B(C104)4) (51). Aluminum perchlorate [14452-95-3] A1(C104)2, forms a series of hydrates having 3, 6, 9, or 15 moles of water per mole of compound. The anhydrous salt is prepared from the trihydrate by drying under reduced pressure at 145—155°C over P2O5 (32). 

The properties of hydrated titanium dioxide as an ion-exchange (qv) medium have been widely studied (51—55). Separations include those of alkaH and alkaline-earth metals, zinc, copper, cobalt, cesium, strontium, and barium. The use of hydrated titanium dioxide to separate uranium from seawater and also for the treatment of radioactive wastes from nuclear-reactor installations has been proposed (56). 

Cesium was discovered by Bunsen and Kirchoff in 1860. It is found in the minerals pollucite, lepidolite, and the borate rhodizite. Pollucite, CsAlSi206, is a hydrated silicate of aluminum and cesium. The concentration of cesium in the earth s crust is estimated to be 3 mg/kg, and in sea water 0.3pg/L. 

---