Copper(II) hydroxide
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.
| Names | |
|---|---|
| IUPAC name
Copper(II) hydroxide | |
| Other names
Cupric hydroxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.039.817 |
| KEGG | |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| 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 |
| negligible | |
Solubility product (Ksp) |
2.20 x 10−20 |
| Solubility | insoluble in ethanol; soluble in NH4OH |
| +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) | |
| 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).
Infobox references | |
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