Nickel Sulfate
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• Nickel(II) sulfate, or just nickel sulfate, usually refers to the chemical compound with the formula NiSO4·6H2O.
• This highly soluble blue-colored salt is a common source of the Ni2+ ion for electroplating.
• Several sulfate salts of nickel(II) are known, all being paramagnetic.
• These salts differ with respect to their hydration or subtle structural details.
• The salt is usually obtained by dissolution of nickel metal or nickel oxides in sulfuric acid.
• Aqueous solutions of nickel sulfate reacts with sodium carbonate to precipitate nickel carbonate, a precursor to nickel-based catalysts and pigments.
•  Addition of ammonium sulfate to concentrated aqueous solutions of nickel sulfate precipitates Ni(NH4)2SO4·6H2O.
• Nickel sulfate occurs as the rare mineral retgersite, which is a hexahydrate.
• The second hexahydrate is known as nickelhexahydrite (Ni,Mg,Fe)SO4·6H2O.
•  The heptahydrate, which is relatively unstable in air, occurs as morenosite.
• This blue-colored solid is analogous to Mohr's salt, Fe(NH4)2SO4·6H2O.
• The significance of the patient’s patch test results, namely allergic reactions to nickel sulphate, cobalt chloride, thiuram mix and colophony, can then be explained relative to her work and the workplace environment.
• Nickel sulfate more frequently determines allergic dermatitis due to contact; less known are nassal inflamation & bronichical asthma caused by nickel sulfate.
• Nickel compounds are known to be human carcinogens based on sufficient evidence of carcinogenicity from studies in humans, including
  epidemiological and mechanistic information, which indicates a causal relationship between exposure to nickel compounds and human cancer.
• Micron size diameter fibers of 2-acrylamido-2-methyl-1-propanesulfonic acid doped polyaniline were prepared via electro spinning.
• The conductivity of individual fibers was found to be lower than that of a cast film of the same polymer. Using the electroless deposition technique, the fibers were coated with thin films of nickel.
• Nanocrystalline nickel and zinc ferrites synthesised using a microemulsion technique were characterised by high resolution transmission electron microscopy and vibrating sample magnetometry.
• Injection of nickel produces distant tumors of the liver in some strains of mice.
• A basic hypophosphite reduced electroless sulphate bath was chosen as the plating bath, where nickel sulphate and iron sulphate were used as the source of metals in the bath, and sodium hypophosphite served as the reductant and source of phosphorus.
• The latter is occasionally used as a calibrant for magnetic susceptibility measurements because it has no tendency to hydrate.
• Ammonium ferric sulfate dodecahydrate (Fisher) and nickel sulfate hexahydrate (Fisher) were used as-received as precursor salts for iron- and
  nickel-bearing powders respectively.
• Nickel compounds and metallic nickel have many industrial and commercial applications including use in stainless steels and other nickel alloys, catalysts, batteries, pigments, and ceramics.

• Nickel Sulfate
• Nickel compounds

Process

• The Crystal Structure of Nickel Sulphate Heptahydrate NiS04' 7 H20.
• Solvent Extraction of nickel (II) Sulphate contaminants
• Growth and characterisation of potassium cobalt nickel sulfate hexahydrate for UV light filters
• Preparation of nickel powers in nonaqueous media
• Polynitroaniline as brightener for zinc–nickel alloy plating from non-cyanide sulphate bath
• Raman spectra of nickel sulphate crystals
• Recycling of  spent nickel based catalyst

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