Nickel(II) perchlorate is a inorganic compound with the chemical formula of Ni(ClO4)2, and it is a strong oxidizing agent. Its colors are different depending on water. For example, the hydrate forms cyan crystals, the pentahydrate forms green crystals, but the hexahydrate (Ni(ClO4)2·6H2O) forms blue crystals.[4]
Some green nickel(II) perchlorate hexahydrate powder.
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Names | |
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IUPAC name
Nickel(II) perchlorate
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Other names
Nickel diperchlorate
Nickel perchlorate Nickel(II) chlorate(VII) Nickel diperchlorate(VII) Nickel perchlorate(VII) | |
Identifiers | |
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3D model (JSmol)
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ChemSpider |
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ECHA InfoCard | 100.033.735 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
Ni(ClO4)2 | |
Molar mass | 257.8636 g/mol (hydrate) 329,92472 g/mol (tetrahydrate) 347.94 g/mol (pentahydrate) 365,95528 g/mol (hexahydrate) 420,00112 g/mol (nonahydrate) |
Appearance | cyan crystals (hydrate) long green needle-shaped crystals (pentahydrate) green crystals (hexahydrate) |
Density | 2.98 g/cm³ (hydrate)[1] 1,508 g/cm³ (hexahydrate) |
Melting point | 140 °C (284 °F; 413 K) (hexahydrate) 149 °C (300 °F; 422 K) (partially decomposed pentahydrate) 103 °C (217 °F; 376 K)) |
259 g/100 mL (hexahydrate)[2] | |
Solubility | soluble in alcohol, aceton insoluble in chloroform forming compounds with ammonia, hydrazine, urea, semicarbazide, carbohydrate, thioure |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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oxidization |
GHS labelling: | |
Danger | |
H271, H314, H317, H334, H341, H350, H360, H372, H410 | |
P201, P260, P273, P280, P303+P361+P353, P304+P340+P310, P305+P351+P338, P308+P313, P391[3] | |
Flash point | flammable |
Related compounds | |
Other anions
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Nickel perrhenate Nickel nitrate |
Other cations
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Iron(II) perchlorate Copper(II) perchlorate |
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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The hexahydrate of nickel(II) perchlorate can be obtained by reacting perchloric acid with nickel(II) hydroxide, nickel(II) chloride or nickel(II) carbonate:[4] The resulting salt is a pentahydrate, Ni(ClO4)2·5H2O. At −21.3 °C (251.9 K; -6.3 °F), the nonahydrate Ni(ClO4)2·9H2O will be formed.
Nickel(II) perchlorate can also be obtained by adding nickel to 6 mol/L perchloric acid for electrolysis with an alternating current of 50 Hz.[5]
The yellow anhydrous product is obtained by adding nickel(II) trifluoroacetate and perchloric acid in a trifluoroacetic acid solvent.[2][6][7]
Nickel(II) perchlorate hexahydrate is a green odourless crystalline solid that is highly soluble in water and soluble in many organic solvents.[8] It begins to decompose from a temperature of 103 °C. It has the hexagonal crystal structure with space group P6/mmm (No. 191).[9] In addition to the hexahydrate, there is also a nonahydrate,[10] a tetrahydrate,[10] a hydrate[1] and a pentahydrate.
Nickel(II) perchlorate hexahydrate is used in the manufacture of other chemical compounds.[3] For example, it is used as a starting material for homometallic trinuclear scorpionate complexes in studies of electronic and magnetic properties.[8] It also serves as a detonator in explosives.[11]