Cobaltous hydroxide

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Rose red crystalline powder. Cobaltous hydroxide is used as a drier in oil paints, varnishes and lithographic printing inks.

Synonyms and Related Terms

cobalt (II) hydroxide; cobalt hydrate


  • ThermoFisher: SDS

Physical and Chemical Properties

  • Rhombohedral crystals.
  • Soluble in acids and ammonium solutions. Insoluble in water and alkalis.
Composition Co(OH)2
Density 3.597 g/ml
Molecular Weight mol. wt. = 92.95

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983

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