IUPAC Name
Copper dihydroxide
Cas Number
20427-59-2
HS Code
28255000
Formula
Cu(OH)2
Industry
-
Appearance
Blue or emerald-green crystalline material
Common Names
Cupric hydroxide, Kuprablau, Parasol
Packaging
1000 @ 25 kg PP/PE bags, 25 MT / 20FCL
20 @ 750 kg PP/PE bags, 15 MT/20 FCL
25 @ 1 MT Jumbo bags, 25 MT / 20`FCL
Brief Overview
Copper(II) hydroxide, also known as cupric oxide, is an inorganic compound and a weak base that appears as blue powder. Some manufacturers would claim they have "stabilized" copper(II) hydroxide, although they likely consist of a mixture of copper(II) carbonate and hydroxide. This is is thermodynamically unstable with respect to decomposition to the oxide. 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
Manufacturing Process
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. Copper(II) hydroxide is produced by a reaction of copper oxychloride in an aqueous suspension with alkali hydroxide or alkaline earth metal hydroxide in the presence of a stabilizing agent and the product is separated and washed.
Cu(NO3)2 + NaOH → Cu(OH)2 + NaNO3
Uses of Copper(II) Hydroxide in different industries: