Cobalt -, sulfate

Kobalto-. cobaltous, cobalto-, cobalt(II). -chlorid, n. cobaltous chloride, cobalt(II) chloride, -cyanwasserstoff, m., -cyanwasser-stoffs ure, /. cobaltocyanic acid, -nitrat, n. cobaltous nitrate, cobalt(II) nitrate, -oxyd, n. cobaltous oxide, cobalt (II) oxide, -salz, n. cobaltous salt, cobalt(IJ) salt, -sulfat, n. cobaltous sulfate, cobalt(II) sulfate, -sulfid, n. cobaltous sulfide, cobalt (II) sulfide, -verbindung, /. cobaltous compound. cobalt(II) compound. 

Sulfite reacts readily with oxygen, particularly under hot, alkaline conditions, but the reaction rate is slow in colder, neutral waters thus complete FW deaeration cannot be guaranteed. Consequently, it is standard practice to add a small amount of catalyst to the sulfite. The catalyst is usually cobalt sulfate [more properly, cobaltous sulfate (CoS04) supplied as an anhydrous, monohydrate, or heptahydrate salt] or sometimes cobaltous nitrate. The catalyst is added to 100% sodium sulfite at a concentration level of 0.2 to 0.25%. 

At FW temperatures and without a catalyst, the sodium sulfite reaction is only 50% complete after 45 seconds, but this rate increases to 100% complete after 10 seconds with cobalt sulfate. 

During this reaction, cobaltous sulfate produces intermediates of cobaltic sulfate [Co2(S04)3] and cobaltous hydroxide [Co(OH)2] before reforming as cobaltous sulfate. 

CobaltCII) sulfate, uses, 7 24 It CobaltCII) sulfate heptahydrate, 7 231 Cobalt sulfate hexahydrate, analysis, 7 237t... 

Rubidium cobalt sulfate (Rb SO CoSO 6HjO) is an example of several double sulfates that rubidium has the ability to form. Rubidium cobalt sulfate is a combined rubidium-cobalt compound in the form of ruby-red crystals. Other rubidium sulfate crystal compounds and their colors are rubidium + copper = white rubidium + iron = dark green and rubidium + magnesium = colorless. 

The approximating polynomial was also used to obtain response surfaces. Figure 8.16 shows a 3D response surface and a 2D contour plot for the rate of deposition as a function of the concentration of cobalt sulfate and pH. The response surface in Figure 8.16 shows that the rate of deposition first increases, reaches a maximum, and then decreases with increase in pH. The value of this maximum increases with an increase in the concentration of cobalt sulfate. 

Figure 8.16. Response surface and contour plot for the rate of electroless cobalt deposition (in /xg/cm -min) as a function of the concentration of cobalt sulfate (in g/L) and pH. (From Ref. 65, with permission from the Electrochemical Society.)...

The multilayered Cu/Co systems discussed here can be grown as described next (6b). Electrolyte composition is based on a cobalt/copper ratio of 100 1 and consists of a solution of 0.34 M cobalt sulfate, 0.003 M copper sulfate, and 30g/L boric acid. The pH is fixed around 3.0, and there is no forced convection while deposition is carried out. The electrodeposition may usually be carried out potentiostatically at 45°C between —1.40 V versus SCE for the cobalt and —0.65 V versus SCE for the copper with an 3 cell potential interrupt between the cobalt-to-copper transition to avoid cobalt dissolution, which can occur when there is no interrupt. 

Testicular atrophy was reported in rats exposed to 19 mg cobalt/m (as cobalt sulfate) for 16 days." Male mice exposed for 13 weeks at 1.14 mg cobalt/m had a decrease in sperm motility, and at 11.4 mg cobalt/m there was testicular atrophy at the high dose female mice had a significant increase in length of the estrous cycle."... 

Rhabdomyosarcomas developed in rats injected intramuscularly with the powder of either pure cobalt metal or cobalt oxide. In other studies implantation of cobalt caused local fibrosarcomas in rabbits, but inhalation studies in hamsters did not reveal any increase in tumors from cobalt oxide. Lifetime exposure to cobalt sulfate by inhalation resulted in increased incidence of alveolar/bronchiolar neoplasms and a spectrum of inflammatory, flbrotic, and proliferative lesions in the respiratory tract of male and female rats and mice. ... 

National Toxicology Program Cobalt Sulfate Heptahydrate (CAS No. 10026-24-1) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). Technical Report Series No 5, NIH Pub No 91-3124. Research Triangle Park, NC, US Department of Health and Human Services, Public Health Service, National Institutes of Health, 1991... 

Inhalation toxicity and carcinogenicity studies of cobalt sulfate. Toxicol Sci 49 56-67, 1999... 

Cobalt(II) carbonate is prepared by heating cobaltous sulfate, cobaltous chloride or any Co2+ salt with sodium bicarbonate in solution ... 

When an oxygen-ozone mixture containing 3.5% ozone is passed through a solution of cobalt sulfate, cobalt (III) hydroxide precipitates. This precipitation is quantitative within the pH range 1.8 to 2.5. The overall reaction is... 

Cobalt sulfate Increased susceptibility for infection (mouse)... 

Synonym Gamma-Chloropropylene Oxide 3-Chloro-1,2-Propylene Oxide Chlorosulfonic Acid Chlorothene Chiorotoluene, Alpha Alpha-Chlorotoluene Omega-Chlorotoluene Chlorotrifluoroethylene Chlorotrimethylsilane Chlorsulfonic Acid Clilorylen Clip Chromic Acid Chromic Anhydride Chromic Oxide Chromium (VI) Dioxychloride Chromium Oxychloride Chromium Trioxide Chromyl Chloride Cianurina Citric Acid Citric Acid, Diammonium Salt Clarified Oil Clorox Cc Ral Coal Tar Oil Cobalt Acetate Cobalt Acetate Tetrahydrate Cobalt (II) Acetate Cobalt Chloride Cobalt (II) Chloride Cobaltous Acetate Cobaltous Chloride Cobaltous Chloride Dihydrate Cobaltous Chloride Hexahydrate Cobaltous Nitrate Cobaltous Nitrate Hexahydrate Cobaltous Sulfate Heptahydrate Cobalt Nitrate Cobalt (II) Nitrate Cobalt Sulfate Compound Name Epichlorohydrin Epichlorohydrin Chlorosulfonic Acid Trichloroethane Benzyl Chloride Benzyl Chloride Benzyl Chloride Trifluorochloroethylene Trimethylchlorosilane Chlorosulfonic Acid Trichloroethylene Cumene Hydroperoxide Chromic Anhydride Chromic Anhydride Chromic Anhydride Chromyl Chloride Chromyl Chloride Chromic Anhydride Chromyl Chloride Mercuric Cyanide Citric Acid Ammonium Citrate Oil Clarified Sodium Hypochlorite Coumaphos Oil Coal Tar Cobalt Acetate Cobalt Acetate Cobalt Acetate Cobalt Chloride Cobalt Chloride Cobalt Acetate Cobalt Chloride Cobalt Chloride Cobalt Chloride Cobalt Nitrate Cobalt Nitrate Cobalt Sulfate Cobalt Nitrate Cobalt Nitrate Cobalt Sulfate... 

Compound Name Cobalt Sulfate Oils Edible Coconut Oils Edible Coconut Oil Resin Oil Rozin Collodion Ethyl Alcohol Methyl Alcohol Methyl Alcohol... 

It is known that olefins are oxidized easily by cobaltic sulfate (2) and toluene by Co3+(H20)6 (3). We found that various hydrocarbons (12) such as toluene, ethylbenzene, and cumene can be oxidized rapidly by cobaltic acetate in the absence of oxygen. 

A solution of 56g of cobalt sulfate 7-hydrate in 300ml of water is heated to boiling and 65gof lead thiocyanate is stirred in. When the lead sulfate is well settled, the mixture is cooled and filtered. The residue is washed with two 25ml portions of cold water the washings are added to the main filtrate which is then evaporated to dryness on the steam bath. The product is finally dehydrated at 105°-120°C for 2-3 hours. 

This compound is prepared from 40g of cobalt carbonate and 20ml of concentrated sulfuric acid in 130ml of water or from 94g of cobalt sulfate 7-hydrate in 150ml of water. The procedure is the same as for the nitrate. 

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