Cupric hydroxide Chemical Properties
- storage temp.
- H2O: insoluble(lit.)
- Water Solubility
- Slightly soluble in waterSoluble in acids, ammonium hydroxide, dilute hydrochloric acid, concentrated alkali and potassium cyanide. Insoluble in water, ethanol, and acetone.
- Solubility Product Constant (Ksp)
- pKsp: 19.66
- Stable, but hygroscopic. Store in dry conditions.
- CAS DataBase Reference
- 20427-59-2(CAS DataBase Reference)
- NIST Chemistry Reference
- Copper hydroxide(20427-59-2)
- EPA Substance Registry System
- Cupric hydroxide (20427-59-2)
Cupric hydroxide Usage And Synthesis
Cupric hydroxide appears as a blue powder and it is not stable. Cupric hydroxide is used as a mordant and pigment, in the manufacture of many copper salts, and for staining paper. It is used as a fungicide/bactericide on fruits, vegetables, and ornamentals. It can be used as catalyst, feed additive, and a cuprammonium rayon process reagent to make the first semi-synthetic fiber product, Rayon. Furthermore, cupric hydroxide is used in the wood preservative products in aqueous systems.
Copper(II) hydroxide, Cu(OH)2, is thermodynamically unstable with respect to decomposition to the oxide. Copper(II) hydroxide prepared by the addition of sodium hydroxide to a salt of copper decomposes at temperatures above 100°C, and in the presence of excess alkali, it decomposes at temperatures above 50°C. It is virtually insoluble in water and decomposes in hot water to the more stable copper(II) oxide and water. Copper(II) hydroxide dissolves quickly in mineral acids and ammonia solution. It is mildly amphoteric, and in concentrated alkali, it forms [Cu(OH)3]- or [Cu(OH)4]2- ions. Copper(II) hydroxides can be produced in a kinetically stabilized form depending on the method of precipitation and choice of additives.
 Michael Ash, Handbook of Preservatives, 2004
 Günter Joseph and Konrad J. A. Kundig, Copper: Its Trade, Manufacture, Use, and Environmental Status, 1999
 Bo Liu, Bin Liu, Yongbo Zhou and Wanzhi Chen, Copper(II) Hydroxide Complexes of N-Heterocyclic Carbenes and Catalytic Oxidative Amination of Arylboronic Acids, Organnometallics, 2010, vol. 29, 1457-1464
 George B. Kauffman, Rayon: The first semi-synthetic fiber product, Journal of Chemical Education, 1993, vol. 70, 887
Blue powder.Soluble in acids and ammonium hydroxide; insoluble in water.
Blue, gelatinous or amorphous powder. Insoluble in water.
In manufacture of rayon, battery electrodes, other Cu salts; as mordant in dyeing; as pigment; in fungicides, insecticides; as feed additive; in treating and staining paper; in preparation of Schweitzer's reagent; in catalysts.
Toxic by ingestion and inhalation.
Inorganic copper fungicide, nematicide, and microbiocide
UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.
Reacts with calcium (metal hydroxides), nitroethane, nitromethane, 1-nitropropane, zirconium
Copper-containing soluble wastes can be concentrated through the use of ion exchange, reverse osmosis, or evaporators to the point where copper can be electrolytically removed and sent to a reclaiming firm. If recovery is not feasible, the copper can be precipitated through the use of caustics and the sludge deposited in a chemical waste landfill Copper-containing wastes can be concentrated through the use of ion exchange, reverse osmosis, or evaporators to the point where copper can be electrolytically removed and sent to a reclaiming firm. Details of copper recovery from a variety of industrial wastes have been published. If recovery is not feasible, the copper can be precipitated by the use of caustics and the sludge deposited in a chemical waste landfill. Recommendable methods: Precipitation, solidification, landfill, discharge to sewer, & incineration. Peer-review: Precipitate copper with alkali, filter, solidify precipitate. (Do not use ammonia as alkali). Cation exchange will allow recovery of copper. Eluate from cation exchanger can be passed through anion exchanger to remove (or reduce) naphthenic acid content. Exhausted ion exchange resins can be landfilled. (Peer-review conclusions of an IRPTC expert consultation)
- salicylic acid, copper salt
- Cupric acetate
- COPPER(II) BENZOYLACETONATE
- Cupric acetylacetonate
- COPPER(II) CYCLOHEXANEBUTYRATE
- COPPER(II) ETHYLACETOACETATE
- Copper bis(2-ethylhexanoate)
- Cupric hydroxide
- Sodium hydroxide
- GOLD COAST SOLUTION NO 1
- Copper(II) sulfate
- Ammonium hydroxide
- Copper(II) chloride
- Calcium hydroxide
- Copper oxychloride
- Aluminum hydroxide
- Cupric oxide
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