Copper(II) hydroxide

Copper(II) hydroxide
Names
	IUPAC name Copper(II) hydroxide
	Other names Cupric hydroxide
Identifiers
CAS Number	20427-59-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	144498 ;
ECHA InfoCard	100.039.817
KEGG	C18712 ;
PubChem CID	164826;
UNII	3314XO9W9A ;
CompTox Dashboard (EPA)	DTXSID6034473 ;
	InChI InChI=1S/Cu.2H2O/h;21H2/q+2;;/p-2 Key: JJLJMEJHUUYSSY-UHFFFAOYSA-L ; InChI=1/Cu.2H2O/h;21H2/q+2;;/p-2 Key: JJLJMEJHUUYSSY-NUQVWONBAH;
	SMILES [Cu+2].[OH-].[OH-];
Properties
Chemical formula	Cu(OH)2
Molar mass	97.561 g/mol
Appearance	Blue or blue-green solid
Density	3.368 g/cm3, solid
Melting point	80 °C (176 °F; 353 K) approximate, decomposes into CuO
Solubility in water	negligible
Solubility product (Ksp)	2.20 x 10−20
Solubility	insoluble in ethanol; ; soluble in NH4OH
Magnetic susceptibility (χ)	+1170.0·10−6 cm3/mol
Thermochemistry
Std molar; entropy (S⦵298)	108 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−450 kJ·mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Skin, Eye, & Respiratory Irritant
NFPA 704 (fire diamond)	2 0 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1000 mg/kg (oral, rat)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (as Cu)
REL (Recommended)	TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)	TWA 100 mg/m3 (as Cu)
Safety data sheet (SDS)	SDS
Related compounds
Other anions	Copper(II) oxide; Copper(II) carbonate ; Copper(II) sulfate ; Copper(II) chloride
Other cations	Nickel(II) hydroxide; Zinc hydroxide ; Iron(II) hydroxide ; Cobalt hydroxide
Related compounds	Copper(I) oxide ; Copper(I) chloride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Copper(II) hydroxide is the hydroxide of copper with the chemical formula of Cu(OH)₂. It is a pale greenish blue or bluish green solid. Some forms of copper(II) hydroxide are sold as "stabilized" copper(II) hydroxide, although they likely consist of a mixture of copper(II) carbonate and hydroxide. Cupric hydroxide is a strong base, although its low solubility in water makes this hard to observe directly.^[3]

^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
^ Zhang, Jun; Richardson, H. Wayne (2016). "Copper Compounds". Ullmann's Encyclopedia of Industrial Chemistry. pp. 1–31. doi:10.1002/14356007.a07_567.pub2. ISBN 978-3-527-30673-2.

[1] Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8

[PGCH-2] NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).

[Ullmann-3] Zhang, Jun; Richardson, H. Wayne (2016). "Copper Compounds". Ullmann's Encyclopedia of Industrial Chemistry. pp. 1–31. doi:10.1002/14356007.a07_567.pub2. ISBN 978-3-527-30673-2.

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