NICKEL(II) HYDROXIDE

NICKEL(II) HYDROXIDE Basic information
Physical Properties Preparation
Product Name:NICKEL(II) HYDROXIDE
Synonyms:Nickel(Ⅱ) Hydroxide;Nickel(II) hydroxide61.5-65.5% (Nickel by Complexometric EDTA);Nickel(II) hydroxide, c.p., 60-61% Ni;NICKEL(II) HYDROXIDE;NICKEL(+2)HYDROXIDE;NICKEL HYDROXIDE;Ni(OH)2;Niekelous hydroxide
CAS:12054-48-7
MF:H2NiO2
MW:92.71
EINECS:235-008-5
Product Categories:Nickel Salts;Salts;metal hydroxide;Materials Science;Metal and Ceramic Science;Nickel Salts;Inorganics;Metal and Ceramic Science
Mol File:12054-48-7.mol
NICKEL(II) HYDROXIDE Structure
NICKEL(II) HYDROXIDE Chemical Properties
Melting point 230°C (dec.)
density 4.1g/mL(lit.)
form Powder
color Green
PH8.37(1 mM solution);8.37(10 mM solution);8.37(100 mM solution)
Water Solubility Insoluble in water. Soluble in dilute acid.
Merck 13,6534
Solubility Product Constant (Ksp)pKsp: 15.26
Exposure limitsACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 10 mg/m3; TWA 0.015 mg/m3
Stability:Stable. Incompatible with strong acids, water, moisture.
InChIKeyBFDHFSHZJLFAMC-UHFFFAOYSA-L
CAS DataBase Reference12054-48-7(CAS DataBase Reference)
EPA Substance Registry SystemNickel hydroxide (Ni(OH)2) (12054-48-7)
Safety Information
Hazard Codes Xn,N,T
Risk Statements 20/22-40-43-50/53-68-48/23-42/43-38-61-49
Safety Statements 22-36-60-61-45-53
RIDADR UN 3077 9/PG 3
WGK Germany 3
RTECS QR7040000
TSCA Yes
HazardClass 9
PackingGroup III
HS Code 28254000
Hazardous Substances Data12054-48-7(Hazardous Substances Data)
MSDS Information
ProviderLanguage
SigmaAldrich English
ACROS English
ALFA English
NICKEL(II) HYDROXIDE Usage And Synthesis
Physical PropertiesGreen hexagonal crystal; density 4.10 g/cm3; decomposes to NiO on heating at 230°C; insoluble in water; KSP 5.47x10-16; monohydrate is insoluble in water but soluble in dilute acids and ammonia.
PreparationNickel hydroxide is prepared by various methods, mostly involving reaction of caustic soda or caustic potash with a soluble nickel salt. Thus, treating nickel sulfate solution with sodium hydroxide forms a voluminous green gel. The gel crystallizes on prolonged storage. Alternatively, the solution on neutralization forms a fine precipitate of nickel hydroxide. Nickel nitrate also is used as starting material to prepare nickel hydroxide. Its aqueous solution, on treatment with sodium or potassium hydroxide, yields a gelatinous precipitate of nickel hydroxide which may be extracted with hot alcohol to form high purity product.
Nickel hydroxide in high purity is prepared by an electrolytic process using metallic nickel as the anode and nickel nitrate solution as the electrolyte. Nickel hydroxide is electrodeposited at an inert cathode.
Chemical PropertiesBlack powder.
Chemical PropertiesNickel hydroxide is a light, apple-green powder.
UsesNickel salts.
UsesDue to its redox behavior, it finds use in rechargeable battery electrodes. It is useful for the storage of electrochemical energy, with potential applications in car batteries. It is a potential material for several biological applications, for example in chromosomal DNA quantification assay.
UsesNickel hydroxide was used as a reference material in a study where the influence of stacking faults on the electrochemical activity of Ni(OH)2 electrodes was studied.
Production MethodsNickel hydroxide is obtained either by treating nickel sulfate solution with sodium hydroxide or by hot alcohol extraction of the precipitate formed as a result of the reaction of nickel nitrate with potassium hydroxide. Nickel hydroxide is used for the manufacture of nickel–cadmium electric cells, and as an intermediate product during the manufacture of nickel catalysts.
PreparationThis is precipitated as finely divided green powder when an alkali metal hydroxide solution is added to an aqueous solution of a nickel(II) salt. It is frequently difficult to filter at first but becomes more crystalline upon prolonged standing. If the nickel salt is incompletely precipitated, especially if very strong solutions of nickel(II) are used, then the precipitate may be a basic salt. This is particularly true of the halides, in which case compounds such as NiCl2?3Ni(OH)2 and NiCl2?Ni(OH)2 have been characterized.
HazardConfirmed carcinogen.
Flammability and ExplosibilityNonflammable
Safety ProfileConfirmed carcinogen with experimental carcinogenic and tumorigenic data. Poison by subcutaneous route. See also NICKEL COMPOUNDS.
Potential ExposureIt may be found in the workplace as a dust, liquid, or acid solution. This compound may be used in nickel plating operations.
ShippingUN3077 Environmentally hazardous substances, solid, n.o.s., Hazard Class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.
IncompatibilitiesIncompatible with strong acids. Aqueous solution may be acidic.
Waste DisposalRecover and recycle where possible or dispose of in a chemical waste landfill.
NICKEL(II) HYDROXIDE Preparation Products And Raw materials
Raw materialsSodium hydroxide-->Nickel sulfate-->NICKEL NITRATE
Preparation ProductsNickel(II) chloride hexahydrate-->Nickel(II) nitrate hexahydrate-->Nickel bis(sulphamidate)
NICKEL BENZOATE NICKEL(II) HYDROXIDE CARBONATE Nickel(II) acetylacetonate (2,2'-THIOBIS(4-(1,1,3,3-TETRAMETHYLBUTYL)PHENOL)ATO(2,1))-(BUTYLAMINE) NICKEL NICKEL(II) HYDROXIDE NICKEL TARTRATE NICKEL ALIZARINATE NICKEL (II) METHOXIDE NICKEL STEARATE NICKEL OCTOATE N,N'-BIS(SALICYLIDENE)ETHYLENEDIAMINONICKEL(II) Nickel(II) acetate tetrahydrate NICKEL CITRATE NICKEL HYDROXYACETATE NICKEL LACTATE TETRAHYDRATE HEXAFLUOROACETYLACETONATO NICKEL (II) TRIHYDRATE nickel(ii) formate dihydrate NICKEL 2-ETHYLHEXANOATE

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