Nickel(II) nitrate

• Nickel nitrate
• Nickel nitrate hexahydrate

Green, deliquescent, water-soluble, hygroscopic crystals

Fixed

2.05 g · cm -3

56.7 ° C

136.7 ° C

Very well in water (940 g · l-1 at 20 ° C)

Risk

For carcinogenic substances no MAK value is generally assigned

1620 mg · kg -1 ( LD50, rat, oral)

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Nickel ( II) nitrate is a chemical compound of the metal from the group of nickel nitrate. It usually comes in the form of its hexahydrate Ni (NO3) 2 · 6H 2 O before, so all data from the table on this.

Properties

Nickel ( II) nitrate is a strong oxidant and is present in various hydrated forms. The most common hexahydrate (Ni (NO 3) 2 · 6H 2 O ). During the slow heating of the nickel ( II ) nitrate hexahydrate forms from 45 ° C the tetrahydrate (Ni (NO3) 2 · 4 H 2 O), from 80 ° C the dihydrate (Ni (NO3) 2 · 2 H2O), at 120 to 145 ° C basic nickel nitrate. On cooling, the nonahydrate can form (Ni (NO3) 2 · 9 H2O). Above 200 ° C is nickel nitrate begins to nickel ( II) oxide to decompose. The rapid heating is 310 to 340 ° C, decomposition to nickel (II ) oxide, oxides of nitrogen and oxygen.

By the reaction of nickel nitrate hexahydrate dissolved with aqueous ammonia (conc. ) at pH > 8 Hexamminnickel (II ) nitrate may be obtained, a complex salt. Like can be recovered from nickel nitrate hexahydrate and hydrazine hydrate Nickelhydrazinnitrat.

The reaction of nickel nitrate solution with sodium hydroxide or sodium hydroxide produced light to apple green nickel (II ) hydroxide.

Use

Nickel ( II) nitrate is used in the ceramics industry ( as a brown pigment), in the dye as a mordant, the electrolytic nickel plating, for the extraction of nickel (II ) oxide and nickel catalyst for producing pure.

Safety

Nickel (II ) nitrate promotes combustion and is classified as a carcinogen.