Nickel(II) hydroxide
Nickel(II) hydroxide is the inorganic compound with the formula Ni(OH)2. It is a lime-green solid that dissolves with decomposition in ammonia and amines and is attacked by acids. It is electroactive, being converted to the Ni(III) oxy-hydroxide, leading to widespread applications in rechargeable batteries.
| Names | |
|---|---|
| IUPAC name
Nickel(II) hydroxide | |
| Other names
Nickel hydroxide, Theophrastite | |
| Identifiers | |
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.813 |
| EC Number |
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PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Ni(OH)2 | |
| Molar mass | 92.724 g/mol (anhydrous) 110.72 g/mol (monohydrate) |
| Appearance | green crystals |
| Density | 4.10 g/cm3 |
| Melting point | 230 °C (446 °F; 503 K) (anhydrous, decomposes) |
| 0.0015 g/L | |
Solubility product (Ksp) |
5.48×10−16 |
| +4500.0·10−6 cm3/mol | |
| Structure | |
| hexagonal, hP3 | |
| P3m1, No. 164 | |
a = 0.3117 nm, b = 0.3117 nm, c = 0.4595 nm α = 90°, β = 90°, γ = 120° | |
| Thermochemistry | |
Std molar entropy (S⦵298) |
79 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−538 kJ·mol−1 |
| Hazards | |
| GHS labelling: | |
| Danger | |
| H302, H315, H317, H332, H334, H341, H350, H360, H372 | |
| P201, P260, P280, P284, P405, P501 | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
1515 mg/kg (oral, rat) |
| Safety data sheet (SDS) | External SDS |
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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