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Cyanide potassium

EPA Classified Toxic Waste, RCRA Waste No P098 DOT Label Poison UN 1680 Formula KCN MW 65.12 CAS [151-50-8] Sfrucfure K+ and CN are held by ionic bond, cubic and orfhorhombic forms, and fee crysfal sfrucfure af room femperafure Synonym kalium cyanide [Pg.324]

Potassium cyanide is used for electrolytic refining of platinum fine silver plating as an electrolyte for the separation of gold, silver, and copper from platinum and for metal coloring. [Pg.324]

White crystalline solid deliquescent mp 634.5°C (1174.1°F) density 1.553 at 20°C (68°F) readily soluble in water (71.6 g/100 g), formamide, glycerol, and hydroxylamine, moderately soluble in liquid ammonia and methanol. [Pg.324]

Potassium cyanide is a dangerous poison toxicity comparable to that of sodium cyanide. Ingestion of 100-150 mg of this compound could be fatal to humans. Similar toxicity is observed when KCN is absorbed through skin or eyes. Intake of the quantity above can cause collapse and cessation of breathing. [Pg.324]

At lower concentrations the acute toxic symptoms are nausea, vomiting, headache, confusion, and muscle weakness. KCN administered in test animals by the intramuscular, intravenous, intraperitoneal, ocular, and oral routes exhibited LD50 values within the range of 3-9 mg/kg the acute toxic effects were ataxia, respiratory stimulation, paralysis, and seizure. [Pg.324]

White deliquescent granular powder or fused pieces odor of bitter almond mp, 634°C.  [Pg.495]

Contact with acids liberates highly flammable hydrogen cyanide. Extinguish fire with dry chemical do not use carbon dioxide.2 [Pg.495]

Oxidants. Oxidized violently or explosively in contact with hot oxidants. Sodium Nitrite. Mixture explodes on heating.3 [Pg.495]

Potassium Cyanide Solutions. Wear breathing apparatus, eye protection, laboratory coat, and butyl rubber gloves. Instruct others to keep a safe distance. Cover the spill with a 1 1 1 mixture by weight of sodium carbonate or calcium carbonate, clay cat litter (bentonite), and sand. Scoop the mixture into a container and transport to the fume hood. Slowly, and while stirring, add the slurry to a pail containing household bleach (about 70 mL/g of cyanide). Test the solution for the presence of cyanide using the Prussian blue test. To 1 mL of the solution, add 2 drops of a freshly prepared 5% aqueous ferrous sulfate solution. Boil the mixture for at least 60 seconds, cool to room temperature and add 2 drops of 1 % ferric chloride solution. Add 6 M hydrochloric acid (prepared by [Pg.495]

Solid Potassium Cyanide. Wear nitrile rubber gloves, laboratory coat, and eye protection. Scoop the solid into a container and transport to the fume hood. Add to 1% sodium hydroxide solution (about 50 mL/g of cyanide). While stirring, slowly add household bleach (about 70 mL/g of cyanide). Continue as for solution spills. Wash the area of the spill thoroughly with soap and water.4,6,7 [Pg.496]


The most important reaction of the sulphonic acids is their conversion into phenols by fusion with caustic alkalis. When they are fused with potassium cyanide, nitriles are obtained, e.g. benzonitriie from ben-zenesulphonic acid. [Pg.378]

If nickel(II) cyanide, Ni(CN)2, is dissolved in excess potassium cyanide, the orange-red complex salt K2Ni(CN)4. HjO can be crystallised out this contains the stable square-planar [Ni(CN)4] anion. [Pg.407]

Silver chloride is readily soluble in ammonia, the bromide less readily and the iodide only slightly, forming the complex cation [Ag(NH3)2]. These halides also dissolve in potassium cyanide, forming the linear complex anion [AglCN) ] and in sodium thiosulphate forming another complex anion, [Ag(S203)2] ... [Pg.428]

In the presence of air, it is attacked by potassium cyanide solution, to give the complex dicyanoaurate(I) ion, in which gold has an oxidation state + 1 ... [Pg.431]

By the action of potassium cyanide on the corresponding alkyl halide. [Pg.121]

To a cold aqueous solution of picric acid, add about an equal volume of dilute potassium cyanide solution. An orange coloration develops and rapidly darkens to a deep red. [Pg.174]

The iodine atom in iodobenzene (unlike that in the corresponding aliphatic compounds) is very resistant to the action of alkalis, potassium cyanide, silver nitrite, etc. This firm attachment of the iodine atom to the benzene ring is typical of aromatic halides generally, although in suitably substituted nitio-compounds, such as chloro-2,4-dinitrobenzene, the halogen atom does possess an increased reactivity (p. 262). [Pg.185]

Potassium cupro-cyanide is the most convenient form in which cuprous cyanide can be used in Sandmeyer s Reaction. It is prepared by adding an excess of potassium cyanide to copper sulphate solution, whereby the cupric cyanide which is formed immediately breaks down to give cuprous cyanide and cyanogen, and the cuprous cyanide then dissolves in the excess of potassium... [Pg.191]

Required Aniline, 20 ml. hydrochloric acid, 50 ml. sodium nitrite, 17 g. copper sulphate, 55 g. potassium cyanide, 60 g. [Pg.191]

Then, while the diazonium solution is standing in ice-water, dissolve 55 g. of powdered copper sulphate (CuS04,5Ha0) in 200 ml. of water contained in a 1500 ml. flat-bottomed flask, for which a steam-distillation fitting is available for subsequent use. Place a thermometer in the copper sulphate solution and warm the latter to 60-65 . Now cautiously add a solution of 60 g. of powdered potassium cyanide in too ml. of water to the copper... [Pg.191]

Many aromatic aldehydes (having the -CHO group joined directly to the benzene ring) undergo polymerisation when heated with a solution of potassium cyanide in aqueous ethanol. Thus benzaldehyde gives benzoin, a compound of double function, since it contains both a secondary alcoholic and a ketonic... [Pg.233]

Add 5 g. of powdered potassium cyanide to a mixture of 20 ml. of water and 50 ml. of ethanol contained in a 200 ml. conical flask, and then add 25 mi. (26 g.) of freshly distilled benzaldehyde. Fit the flask with a reflux water-condenser, and boil the mixture gently on a water-bath for 30 minutes, a clear solution being rapidly obtained. Then pour the solution into a beaker and cool the benzoin separates as a crystalline mass... [Pg.233]

A concentrated solution of monochloroacetic acid is neutralised with sodium bicarbonate, and then heated with potassium cyanide, whereby sodium cyano-acetate is obtained ... [Pg.272]

Required Monochloroacetic acid, 30 g. sodium bicarbonate, 30 g. potassium cyanide, 24 g. sulphuric acid, 50 ml. rectified spirit, 70 ml. [Pg.272]

Niiroprusside test. Dissolve about o-i g. of cystine in a few ml. of dilute ammonia and then add a few drops of potassium cyanide solution. This reduces cystine to cysteine,... [Pg.383]

Noth. The above method can be successfully applied only to dilute solutions of formaldehyde which are free in particular from other alfphatic aldehydes, since the latter, if present, would undergo a similar oxidation. Formaldehyde, if mixed with other aldehydes, should be estimated by quantitative addition of potassium cyanide for details, see advanced text-books of quantitative organic analysis. [Pg.458]

Other sources of hazard arise from the handling of such chemicals as concentrated acids, alkalis, metallic sodium and bromine, and in working with such extremely poisonous substances as sodium and potassium cyanides. The special precautions to be observed will be indicated, where necessary, in the experiments in which the substances are employed, and will also be supplied by the demonstrator. The exercise of obvious precautions and cautious handling will in most cases reduce the danger to almost negligible proportions. Thus, if concentrated sulphuric acid should be accidentally spilled, it should be immediately washed with a liberal quantity of water or of a solution of a mild alkali. [Pg.206]

Strictly speaking the alkyl halides are esters of the halogen acids, but since they enter into many reactions (t.g., formation of Grignard reagents, reaction with potassium cyanide to yield nitriles, etc.) which cannot be brought about by the other eaters, the alkyl halides are usually distinguished from the esters of the other inorganic acids. The preparation of a number of these is described below. [Pg.302]

The carbonyl compound may be mixed with an aqueous solution of sodium or potassium cyanide and mineral acid is added, or the bisulphite compound may be treated with an equivalent quantity of sodium cyanide, for example ... [Pg.341]

Equip a 1-litre three-necked flask with a mechanical stirrer, a separatory funnel and a thermometer. Place a solution of 47 g. of sodium cyanide (or 62 g. of potassium cyanide) in 200 ml. of water in the flask, and introduce 58 g. (73-5 ml.) of pure acetone. Add slowly from the separatory fumiel, with constant stirring, 334 g. (275 ml.) of 30 per cent, sulphuric acid by weight. Do not allow the temperature to rise above 15-20° add crushed ice, if necessary, to the mixture by momentarily removing the thermometer. After all the acid has been added continue the stirring for 15 minutes. Extract the reaction mixture with three 50 ml. portions of ether, dry the ethereal extracts with anhydrous sodium or magnesium sulphate, remove most of the ether on a water bath and distil the residue rapidly under diminished pressure. The acetone cyanohydrin passes over at 80-82°/15 mm. The yield is 62 g. [Pg.348]

Ethyl malonate can be conveniently prepared by neutralising a solution of monochloroacetic acid with sodium bicarbonate, then heating with potassium cyanide to form sodium cyanoacetate ... [Pg.483]

Carry out this preparation in the fume cupboard. Dissolve 100 g. of chloroacetic acid (Section 111,125), contained in a large porcelain basin or casserole, in 200 ml. of water. Warm the solution to about 50°, using a 200° thermometer as a stirring rod. Introduce 90 g. of pure, powdered sodium bicarbonate in small quantities at a time with stirring maintain the temperature at 50-60° until effervescence ceases. Now add 80 g. of pure, finely-powdered potassium cyanide (or an equivalent quantity of sodium cyanide), stir the mixture without further warming until the... [Pg.484]

The formation of ethyl isopropylidene cyanoacetate is an example of the Knoevenagel reaction (see Discussion before Section IV,123). With higher ketones a mixture of ammonium acetate and acetic acid is an effective catalyst the water formed is removed by azeotropic distillation with benzene. The essential step in the reaction with aqueous potassium cyanide is the addition of the cyanide ion to the p-end of the ap-double bond ... [Pg.490]

Di lve 20 g. of the cyano ester in 100 ml. of rectified spirit and add a solution of 19 2 g. of pure potassium cyanide in 40 ml. of water. Allow to stand for 48 hours, then distil oflF the alcohol on a water bath. Add a large excess of concentrated hydrochloric acid and heat under reflux for 3 hours. Dilute with water, saturate the solution with ammonium sulphate, and extract with four 75 ml. portions of ether. Dry the combined ethereal extracts with anhydrous sodium or magnesium sulphate, and distil off the ether. RecrystaUise the residual acid from excess concentrated hydrochloric acid, and dry in the air. The yield of pure ew-dimethyl-succinic acid, m.p. 141-142°, is 12 g. [Pg.495]

The appropriate succinic acid can be prepared by condensation of the iinsaturatod (yano ester with alcoholio potassium cyanide. [Pg.495]

The Sandmeyer reaction may also be applied to the preparation of nitriles. The solution of the diazonium salt is added to a solution of cuprous cyanide in excess of sodium or potassium cyanide solution (sometimes improved yields are obtained by substituting nickel cyanide for cuprous cyanide), for example CH3 CH, CH3... [Pg.594]

Benzonitrile (phenyl cyanide). Prepare a cuprous cyanide solution in a 500 ml. round-bottomed flask as above, but use the following quantities 65 g. of crystallised copper sulphate in 205 ml. of water, 18 g. of sodium bisulphite in 52 ml. of water, and 18 g. of potassium cyanide in... [Pg.608]

Benzoylpropionitrile. To a mixture of 21 4 g. of p dimethylamino propiophenone hydrochloride, 13 0 g. of potassium cyanide in a 500 ml. flask, add 260 ml. of boiling water heat the heterogeneous mixture under reflux for 30 minutes. Part of the dimethylamine, which is eliminated in the reaction, distils collect this in dilute hydrochloric acid. Cool the reaction mixture in ice the oil sohdifies and crystals form from the aqueous layer. Collect the solid (crude p benzoylpropiouitrile, 10-5 g.) by suction filtration and recrystallise it from benzene - light petroleum (b.p. 40-60°) it separates as almost colourless blades, m.p. 76°. [Pg.912]


See other pages where Cyanide potassium is mentioned: [Pg.19]    [Pg.119]    [Pg.194]    [Pg.324]    [Pg.422]    [Pg.423]    [Pg.103]    [Pg.121]    [Pg.191]    [Pg.233]    [Pg.233]    [Pg.273]    [Pg.191]    [Pg.493]    [Pg.607]    [Pg.608]    [Pg.609]    [Pg.714]    [Pg.763]    [Pg.767]    [Pg.772]   
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Lewis acids with potassium cyanide

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Reaction Condensation of an Aldehyde by Potassium Cyanide to a Benzoin

Reaction XLIX.—(a) Action of Cuprous Potassium Cyanide on Aromatic Diazonium Compounds (Sandmeyer)

Zinc hydride potassium cyanide

Zinc-Potassium cyanide

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