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Chromium III sulfate

A 500-ml three-necked flask fitted with a mechanical stirrer and a nitrogen inlet and outlet is charged with 30 g (approx. 0.055 mole) of hydrated chromium (III) sulfate, 200 ml of distilled water, 7.5 g (0.12 g-atom) of mossy zinc, and 0.4 ml (5.4 g, 0.03 g-atom) of mercury. The flask is flushed with nitrogen for 30 minutes and a nitrogen atmosphere is maintained. The mixture is then heated to about 80° with stirring for 30 minutes to initiate reaction. Then the mixture is stirred at room temperature for an additional 30 hours, by which time the green mixture has been converted to a clear blue solution. Solutions prepared as above are about 0.55 M in chromium (II) and are indefinitely stable if protected from oxygen. [Pg.23]

Chromi-nydroxyd, n. chromic hydroxide, chro-mium(III) hydroxide, -oxyd, n. chromic oxide, chromium(III) oxide, -rhodanwasser-stoffsMure, /. chromithiocyanic acid, thio-cyanatochromic(III) acid, -salz, n. chromic salt, chromium(III) salt, -suifat, n. chromic sulfate, chromium(III) sulfate, -suifocyan-saure, /. chromithiocyanic acid, thiocyana-tochromic(III) acid, -verbindung,/. chromic compound, chromium(III) compound. [Pg.92]

Potassium chromate, manufacture, 6 542 Potassium chromate(VI), physical properties, 6 528t Potassium chromium(III) sulfate... [Pg.751]

Mallinckrodt analytical reagent, chromium(III) sulfate crystals, Cr2(S04)3(H20)x, were employed. Repeated preparations with this substance have indicated its average formula weight to be 542. [Pg.51]

Chromium(III) sulfate is prepared by treating chromium(III) hydroxide with sulfuric acid followed by crystaUization ... [Pg.229]

The most popular tanning solution in current use is termed 33% basic chromium(III) sulfate and corresponds to the empirical formula CrOHSCV In older procedures, chromate was often reduced at the plant using glucose/sulfuric acid mixtures. At present, 33% basic chromium sulfate is provided as either a solution (chrome liquor) or as a commercially available powder,120 of constant, but at present slightly uncertain, chemical composition. [Pg.907]

Toxicological or carcinogenic effects have not been detected in rats receiving up to 5% chromium(III) oxide in their feed [3.70] nor in medical studies performed in chemical plants producing chromium(III) oxide and chromium(III) sulfate [3.71], The oral LD50 for chromium(III) oxide in the rat is > 10000 mg/kg it does not irritate the skin or mucous membranes. [Pg.98]

Commercial hydrated chromium (III) sulfate is dehydrated in an oven at 100-120°C. When the salt no longer dissolves in water the process is complete. ... [Pg.172]

This material is prepared exactly as described for the corresponding ethyienediamine salt, using 30ml of pn and 21g of anhydrous chromium (III) sulfate. [Pg.175]

No reaction was observed when 86.5g of anhydrous di-propylenetriamine were heated with 27g of dehydrated chromium (III) sulfate on the steam bath. There was no sign of decomposition even after 4 hours at 2G0°C. A drop of water added as catalyst made no difference. [Pg.175]

One hundred grams of very finely powdered potassium chromium (III) sulfate (chrome alum) are mixed in a flask... [Pg.199]

Hydroxoaquobis(biguanide)chromium(III) sulfate forms violet crystals which are sparingly soluble in water and do not lose any water even when heated to 120°. On treatment with hot caustic solution the substance is converted into tris(biguanidato) chromium which separates as ruby-red crystals. The chloride of the hydroxoaquo compound may be prepared as rose-red crystals by treating the sulfate with the calculated amount of barium chloride. [Pg.71]

Chromium oxychloride, formation of, by CrCl2, 1 126 Chromium(II) salts, 6 144 Chromium (III) sulfate, anhydrous, 2 197... [Pg.230]

Tris (ethylenediamine) chromium-(III) iodide, 1-hydrate, 2 199 Tris (ethylenediamine) chromium-(III) sulfate, 2 198 Tris (ethylenediamine) chromium-(III) thiocyanate, 1-hydrate, 2 199... [Pg.251]

In 1997, the major manufacturers of chromium compounds were (1) chromic(VI) acid, including chromic(VI) anhydride and chromic(VI) trioxide (total capacity 76,000 metric tons) American Chrome Chemicals Inc., Corpus Christi, Texas Occidental Chemical Corporation Specialty Business Group, Castle Hayne, North Carolina (2) chromium(III) sulfate Blue Grass Chemical Specialties, L.P., New Albany, Indiana Johnson Matthey, Inc., Ward Hill, Massachusetts Wayne Chemical Corp., Amarillo, Texas, Dakota City, Nebraska, and Milwaukee, Wisconsin (3) chromium(III) acetate Blue Grass Chemical Specialties, L.P., McGean-Rohco, Inc., Cleveland, Ohio The Shepard Chemical Company, Cincinnati, Ohio (4) chromium acetylacetonate MacKenzie Corporation, Bush, Louisiana The Shepard Chemical Company, Cincinnati, Ohio (5) chromium boride Cerac Incorporated, Milwaukee,... [Pg.318]

If tri8(ethylenediamine)chromium(III) chloride is prepared by the method of Rollinson and Bailar,7 it is worthy of note that if the dehydration of the hydrated chromium (III) sulfate is performed in a vacuum oven (2-3 mm. Hg, 70-80°C.) the anhydrous sulfate is obtained in a much more reactive form so that the reaction with ethylenediamine, when started by local heating, proceeds by itself and is finished within an hour. Editor s note For an alternative preparation, see Inorganic Syntheses, 10, 33 (1967) also ref. 26. [Pg.275]

TRIS (ETH YLENEDIAMINE) CHROMIUM (III) SULFATE A MODIFIED PROCEDURE... [Pg.1]

See other pages where Chromium III sulfate is mentioned: [Pg.368]    [Pg.132]    [Pg.162]    [Pg.401]    [Pg.274]    [Pg.637]    [Pg.132]    [Pg.228]    [Pg.228]    [Pg.867]    [Pg.172]    [Pg.62]    [Pg.71]    [Pg.71]    [Pg.70]    [Pg.238]    [Pg.59]    [Pg.67]    [Pg.68]    [Pg.154]    [Pg.160]    [Pg.210]    [Pg.210]    [Pg.347]    [Pg.99]   
See also in sourсe #XX -- [ Pg.35 , Pg.43 , Pg.149 ]

See also in sourсe #XX -- [ Pg.26 , Pg.139 ]



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Anhydrous Chromium (III) Sulfate

Chromium (III)

Chromium sulfate

III) Sulfate

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