Sodium alloys liquid

Potassium-sodium alloy Liquid Solution of two solids (K + Na)... 

Sodium, potassium and sodium-potassium alloys Liquid sodium, potassium or alloys of these elements have little effect on niobium at temperatures up to 1 000°but oxygen contamination of sodium causes an increase in corrosionSodium does not alloy with niobium . In mass transfer tests, niobium exposed to sodium at 600°C exhibited a corrosion rate of approximately 1 mgcm d . However, in hot trapped sodium at 550°C no change of any kind was observed after 1 070 h . 

In the inter-alkali alloys, eutectic equilibria have been observed in a number of systems very low melting points have been determined for instance in the Rb-Na system (L (Rb) + (Na), at 82.5 at.% Rb and —4.5°C) and even lower melting temperatures have been observed in ternary systems. Binary sodium-potassium alloys, liquid at room temperature (at 25°C in a composition range of about 15-70 at.% Na, about 7-57 mass% Na), have a good thermal conductivity and a wide temperature range where they are liquid they may be used in heat-exchange systems. Their extremely high chemical reactivity must of course be taken into account. 

The earlier references, which state that this powerful oxidant is stable when pure, but explosive when formed as a layer on metallic potassium [1,2], are not wholly correct [3], because the superoxide is manufactured uneventfully by spraying the molten metal into air to effect oxidation [4]. Previous incidents appear to have involved the explosive oxidation of unsuspected traces of mineral oil or solvents [3]. However, mixtures of the superoxide with liquid or solid potassium—sodium alloys will ignite spontaneously after an induction period of 18 min, but combustion while violent is not explosive [3]. The additional presence of water (which reduces the induction period) or hydrocarbon contaminant did produce explosion hazards under various circumstances [5]. Contact of liquid potassium with the superoxide gives no obvious reaction below 117°C and a controlled reaction between 117 and 177°C, but an explosive reaction occurs above 177°C. Heating at 100°C/min from 11° caused explosion at 208°C [6],... 

Flammable liquid. A dangerous fire hazard when exposed to heat, flame, sparks, friction, or oxidizing materials. Severe explosion hazard when exposed to heat or flame. Ignition and potentially explosive reaction when heated in contact with rust or iron. Mixtures with sodium or potassium-sodium alloys are powerfiol, shock-sensitive... 

A combination of the alternative pathways illustrated in Schemes 13 and 15 explains why the derivative of dimethyl fra 5-cyclohexane-l,2-dicarboxylate (22) fails to give any of the silylated coupled enediol even at 25 °C, using sodium-potassium alloy in benzene, thermal rearrangement to an octa-1,3-diene occurs, whereas use of sodium in liquid ammonia, at -78 °C, cleaves the bond joining the two functionalized carbon atoms, leading to dimethyl 2,7-dimethyloctane-l,8-dioate. ... 

Properties Soft, silvery solid or liquid. (1) 78% potassium, 22% sodium mp -11C, bp 784C, d 0.847 (100C) (2) 56% potassium, 44% sodium mp 19C, bp 825C, d 0.886 (100C). Must be kept away from air and moisture. The liquid forms come under the class name potassium (or sodium) metallic liquid alloy. 

ETHANE PENTACHLORIDE (76-01-7) CHCljCClj Noncombustible liquid. Incompatible with water, producing dichloroacetic acid. May self-ignite in air. Incompatible with strong oxidizers. Contact with aluminum, cadmium, mercury, hot iron, alkalis, alkali metals causes dehologenation, forming chloroacetylene gas which is spontaneously explosive in air. Contact with potassium may explode (after a short delay) or form shock- and friction sensitive materials. Incompatible with potassium-sodium alloy + bromoform reaction may be violent. 

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