Chromic chloride hydroxide

Synonyms Methacrylato chromic chloride hydroxide Empnical CiHsCljCrjO,... 

Methacrylato chromic chloride hydroxide. See Methacrylalochromic chloride... 

Methacrylate copolymer Methacrylate polymer. See Methacrylic acid copolymer Methacrylatochromic chloride Synonyms Methacrylate chromic chloride hydroxide... 

Synonyms Chrome complex of stearic acid Chromic chloride stearate Octadecanoato chromic chloride hydroxide (1 2 4 1) Stearato chromic chloride Stearato-chromic chloride complex... 

The Chemical Abstracts Index name for the prime component of Volan is methacrylato chromic chloride hydroxide. The CAS Registry Number is 15096-41-0. The structure is shown in Fig. 6. 

Twenty cubic centimeters of a 5 per cent solution of chromic chloride, to which 1 g. of sodium acetate had been added, is boiled in an Erlenmeyer flask provided with a funnel to serve as an air condenser. The boiling should be timed to 1 min. To one-half of the cooled solution, a solution of potassium hydroxide (1 3) is added until distinct alkalinity is reached. To the other half of the solution of chromic chloride ammonium hydroxide is added to alkalinity. 

Oxidation states of chromium - -2, - -3, and -f-6. Oi es of chromium chronate, FeCr204, and crocoite, PbCr04. Chromium metal and its alloys ferrochrome, alloy steels, stainless steel. The aluminothermic process (Goldschrtiidt process). Electrolytic chromium. Chromium trioxide, chromic acid, dichromic acid, potassium chromate, potassium didiromate, sodium chromate, lead chromate. Equilibrium between chromate ion and dichromate ion. Chrome-tanned leather. Chromic oxide (chrome green) chromic ion, chrome alum, chromic chloride, chromic hydroxide, chromite ion. Chromous compounds. Peroxy-chromic acid. 

A solution of chromic chloride is readily obtained by the action of dilute hydrochloric acid on chromic hydroxide, or on chromium sesquioxide which has not been ignited this solution on evaporation yields an amorphous, deliquescent, green mass, soluble in water and in alcohol. The product on heating in hydrogen chloride or chlorine at temperatures above 250° C. becomes anhydrous, at the same time assuming the usual colour of the anhydrous salt. Basic chlorides are formed by... 

On progressive hydrolysis, chromic chloride gives rise to two soluble basic chlorides, Cr(OH)Cl2 and Cr(OH)2Cl, and an insoluble grey-green hydroxide. The compound, Cr(OH)2Cl, is never present in any large proportion, and the hydroxide is only formed upon addition of alkali. The formulae of the three compounds are probably [Cr H20)5(0H)]Cl2, [Cr(H20)4(0H)2]Cl, and Cr(H20)3(0H)3 respectively. 

Colloidal Chromium Hydroxide.—The hydrosol is obtained as a deep greeir solution by the peptisation of the hydroxide by means of chromic chloride, or by a solution of copper oxide in ammonia. As already stated, the freshly precipitated hydroxide forms an apparently clear green solution with excess of an alkali hydroxide. That the chromic hydroxide is peptised and not dissoh ed is shown by the fact that it can be completely filtered out by means of a collodion, filter, leaving a colourless filtrate. The colloidal solution is stable while hot, but slowly yields a gel on keeping at ordinary temperatures. ... 

Both positively and negatively charged colloids have been prepared. The former results when the hydrated oxide is pejotised with chromic chloride, or may be formed by hydrolysis of the chloride or nitrate the latter is prepared by peptising the hydrous oxide with sodium or potassium hydroxide, or by adding sodium hydroxide to chromium nitrate solution in presence of arsenious acid and then dialysing. ... 

J. Sand and F. Grammling measured the velocity with which the violet hexahydrate Uberates iodine from a mixture of potassium iodide and iodate, and found the results to be in agreement with the assumption that the molecule is Cr.2Cl0.12H2O, and not [Cr(H20)e]C33. H. W. Fischer found that the solubility of chromium hydroxide in an aq. soln. of green chromic chloride is not directly proportional to the cone, of the latter. A basic chloride is probably formed. From a soln. of chromium hydroxide in aq. chromic chloride, the former cannot be precipitated either by the addition of electrolytes or by the action of heat part of it is supposed VOL. XI. 2 0... 

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