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Cupric hydroxide

Basic information Description Chemical Properties References Safety Related Supplier

Cupric hydroxide Basic information

Product Name:
Cupric hydroxide
CAS:
20427-59-2
MF:
CuH2O2
MW:
97.56
EINECS:
243-815-9
Mol File:
20427-59-2.mol
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Cupric hydroxide Chemical Properties

Density 
3.4
storage temp. 
0-6°C
solubility 
H2O: insoluble(lit.)
form 
Powder
color 
Blue
Water Solubility 
Slightly soluble in waterSoluble in acids, ammonium hydroxide, dilute hydrochloric acid, concentrated alkali and potassium cyanide. Insoluble in water, ethanol, and acetone.
Sensitive 
Hygroscopic
Merck 
14,2642
Solubility Product Constant (Ksp)
pKsp: 19.66
Stability:
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)
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Safety Information

Hazard Codes 
Xn,N,T
Risk Statements 
22-37/38-41-50/53-23
Safety Statements 
26-36-39
RIDADR 
3262
WGK Germany 
3
RTECS 
GL7600000
TSCA 
Yes
HS Code 
28255000
Hazardous Substances Data
20427-59-2(Hazardous Substances Data)

MSDS

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Cupric hydroxide Usage And Synthesis

Description

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.

Chemical Properties

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.

References

[1] Michael Ash, Handbook of Preservatives, 2004
[2] Günter Joseph and Konrad J. A. Kundig, Copper: Its Trade, Manufacture, Use, and Environmental Status, 1999
[4] 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
[5] George B. Kauffman, Rayon: The first semi-synthetic fiber product, Journal of Chemical Education, 1993, vol. 70, 887

Chemical Properties

Blue powder.Soluble in acids and ammonium hydroxide; insoluble in water.

Chemical Properties

Blue, gelatinous or amorphous powder. Insoluble in water.

Uses

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.

Hazard

Toxic by ingestion and inhalation.

Potential Exposure

Inorganic copper fungicide, nematicide, and microbiocide

Shipping

UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.

Incompatibilities

Reacts with calcium (metal hydroxides), nitroethane, nitromethane, 1-nitropropane, zirconium

Waste Disposal

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)

Cupric hydroxide Preparation Products And Raw materials

Raw materials

Preparation Products

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Cupric hydroxideSupplierMore

J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Email:
saleschina@alfa-asia.com
BeiJing Hwrk Chemicals Limted
Tel:
010-57411839-
Email:
bjsales@hwrkchemical.com
Energy Chemical
Tel:
021-58432009
Email:
sales8178@energy-chemical.com
JinYan Chemicals(ShangHai) Co.,Ltd.
Tel:
13817811078,021-50426030
Email:
sales@jingyan-chemical.com
Basic information Description Chemical Properties References Safety Related Supplier