71-48-7 Usage
Uses
Different sources of media describe the Uses of 71-48-7 differently. You can refer to the following data:
1. Cobalt(II) acetate is used for bleaching and drying varnishes and laquers. Other applications are: as a foam stabilizer for beverages; in sympathetic inks; as a mineral supplement in animal feed; and as a catalyst for oxidation. It also is used in aluminum anodizing solutions.
2. Cobalt(II) acetate is used as an industrial catalyst. It is used as a precursor to various oil drying agents. It finds application in ion exchange agents, lubricants, plating agents and surface treating agents, greases, ink, toner, and colorant products.
3. Sympathetic inks, paint and varnish driers, catalyst, anodizing, mineral supplement in feed additives, foam stabilizer.
Preparation
Cobalt(II) acetate is prepared by dissolving cobalt(II) carbonate or hydroxide in dilute acetic acid, followed by crystallization. Also, it may be prepared by oxidation of dicobalt octacarbonyl in the presence of acetic acid.
Chemical Properties
Violet Crystalline Powder or Pale pink to purple Powder. Catalyzer for oxidizing dimethylbenzene, desiccant for coating, mordant for printing, accelerant for solidifying glass.
Cobalt(II) acetate is one of the compounds recommended for colouring the oxide layer formed on aluminium and its alloys by anodizing.
Physical properties
Red-to-violet monoclinic crystals (anhydrous acetate is light pink in color); density 1.705 g/cm3; becomes anhydrous when heated at 140°C; soluble in water, alcohols and acids.
Definition
ChEBI: A cobalt salt in which the cobalt metal is in the +2 oxidation state and the counter-anion is acetate.
General Description
Red-violet crystalline solid. Vinegar-like odor.
Air & Water Reactions
Water soluble. Deliquescent
Reactivity Profile
Salts, basic, such as Cobalt acetate, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.
Hazard
May not be used in food products (FDA).
Health Hazard
Inhalation causes shortness of breath and coughing; permanent disability may occur. Ingestion causes pain and vomiting. Contact with eyes causes irritation. Contact with skin may cause dermatitis.
Fire Hazard
Special Hazards of Combustion Products: Toxic cobalt oxide fumes may form in fire.
Safety Profile
Poison by intravenous
route. Moderately toxic by ingestion.
Questionable carcinogen. Mutation data
reported. See also COBALT
COMPOUNDS. When heated to
decomposition it emits acrid smoke and
irritating fumes.
Check Digit Verification of cas no
The CAS Registry Mumber 71-48-7 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 1 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 71-48:
(4*7)+(3*1)+(2*4)+(1*8)=47
47 % 10 = 7
So 71-48-7 is a valid CAS Registry Number.
InChI:InChI=1/C2H4O2.Co/c1-2(3)4;/h1H3,(H,3,4);/q;+2/p-1
71-48-7Relevant articles and documents
Co(II)-salen catalyzed stereoselective cyclopropanation of fluorinated styrenes
Tai, Serene,Maskrey, Taber S.,Nyalapatla, Prasanth R.,Wipf, Peter
, p. 1014 - 1027 (2019/11/14)
Three cis-selective Co(II)-salen complexes have been developed for the asymmetric cyclopropanation of para-fluorinated styrenes with ethyl diazoacetate. Increasing the steric reach of the C2-symmetric ligand side chains improved the enantiomeric ratio of the reaction from 28:1 to 66:1. The methodology was exemplified by the gram-scale synthesis of a lead compound for the treatment of castration-resistant prostate cancer (CRPC), as well as a structurally related analog.
The Kinetics of Growth of Metallo-supramolecular Polyelectrolytes in Solution
Munzert, Stefanie Martina,Stier, Simon P.,Schwarz, Guntram,Weissman, Haim,Rybtchinski, Boris,Kurth, Dirk G.
, p. 2898 - 2912 (2017/10/06)
Several transition metal ions, like Fe2+, Co2+, Ni2+, and Zn2+ complex to the ditopic ligand 1,4-bis(2,2′:6′,2′′-terpyridin-4′-yl)benzene (L). Due to the high association constant, metal-ion induced self-assembly of Fe2+, Co2+, and Ni2+ leads to extended, rigid-rod like metallo-supramolecular coordination polyelectrolytes (MEPEs) even in aqueous solution. Here, we present the kinetics of growth of MEPEs. The species in solutions are analyzed by light scattering, viscometry and cryogenic transmission electron microscopy (cryo-TEM). At near-stoichiometric amounts of the reactants, we obtained high molar masses, which follow the order Ni-MEPE≈Co-MEPEa reversible step-growth mechanism. The forward polymerization rate constants follow the order Co-MEPEFe-MEPENi-MEPE and the growth of MEPEs can be accelerated by adding potassium acetate.
Structural, spectral and magnetic properties of carboxylato cobalt(II) complexes with heterocyclic N-donor ligands: Reconstruction of magnetic parameters from electronic spectra
Titis,Hudak,Kozisek,Krutosikova,Moncol',Tarabova,Boca
, p. 106 - 113 (2012/07/14)
Heteroleptic cobalt(II) complexes with general formula of [Co(N-base) 2(car)2(H2O)2], have been synthesized and structurally characterized; the N-base stands for neutral N-donor ligands: iso-quinoline (iqu), [1]
