11135-81-2 POTASSIUM SODIUM ALLOY

Name: POTASSIUM SODIUM ALLOY
Synonyms: SODIUM-POTASSIUM ALLOY;POTASSIUM SODIUM ALLOY;Potassiumsodiumalloy78:22(99.95%);potassiumsodiumalloys;sodiumpotassiumalloy,nak;SODIUM-POTASSIUM ALLOY (22% NA, 78% K);SODIUM-POTASSIUM ALLOY (44% NA, 56% K);Potassiumsodiumalloy78:22
CAS Number:11135-81-2
Molecular Formula:KNa
Molecular Weight:62.09
EINECS:
Density:
Boiling Point:813°C
Flash Point:
Safety Description:A low-melting alloy of Na and K. Its toxicity is due to either Na or K alone. Corrosive to the eyes, skin, and mucous membranes. Upon contact with moisture it reacts violently to evolve H₂; much heat; and a highly caustic residue of NaOH or KOH. Oxidation forms Na₂O and K₂O, which are powerful caustics.

A dangerous fire and explosion hazard. Violent or explosive reaction with O₂, water, moisture, steam, halogens, oxidizers, acids or acid fumes, giving off much heat, hydrogen, toxic and corrosive fumes, often spattering either red-hot particles or actually flaming particles. A severe explosion hazard, will react explosively under the appropriate conditions with moisture, acids, acid fumes, solid CO₂, carbon disulfide, halocarbons (e.g., CH₃Cl, carbon tetrachloride, chloroform, bromoform, 1,1,1-trichloroethane, 1,1,2-trichlorotrifluoroethane, tetrachloroethane, CH₂Cl₂, CH₂I₂), ammonium sulfate + NH₄ + NO₃, HgO, metal halides (e.g., silver halides, zinc chloride, iron(III) chloride), metal oxides (e.g., silver oxide, mercury oxide), nitrogen-containing explosives (e.g., ammonium nitrate, ammonium sulfate, picric acid, nitrobenzene), oxalyl bromide, oxalyl chloride, pentachloroethane, K oxides, KO₂, Si, NaHCO₃, polytetrafluoroethylene. Reacts vigorously with oxidizing materials.

To fight fire, use G-1 powder, dry sodium chloride, dry sodium carbonate, dry calcium carbonate, dry sand, resin-coated sodium chloride, or dry soda ash. Never use water, graphite, carbon dioxide, halocarbons, or foam.

Dangerous; when heated it emits highly toxic fumes of Na₂O and K₂O. Used as a liquid coolant for nuclear reactor cores. See also SODIUM and POTASSIUM.
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