Nickel (II) nitrate

Structural formula
General
Surname	Nickel (II) nitrate
other names	Nickel nitrate Nickel nitrate hexahydrate
Molecular formula	Ni (NO 3 ) 2 (anhydrous) Ni (NO 3 ) 2 6 H 2 O (hexahydrate)
Brief description	green, deliquescent, water-soluble, hygroscopic crystals
External identifiers / databases
CAS number 13138-45-9 (anhydrous) 13478-00-7 (hexahydrate) 14216-75-2 (nitric acid, nickel salt) EC number 236-068-5 PubChem 25736 Wikidata Q425274
properties
Molar mass	182.72 g mol −1 (anhydrous) 290.83 g mol −1 (hexahydrate)
Physical state	firmly
density	2.05 g cm −3
Melting point	56.7 ° C
boiling point	136.7 ° C
solubility	very good in water (940 g l −1 at 20 ° C)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 350i-341-360D-372-272-332-302-315-318-334-317-410 P: 201-210-261-273-280-284
MAK	Switzerland: 0.05 mg m −3 ( inhalable dust , measured as nickel )
Toxicological data	1620 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel (II) nitrate is a chemical compound of the metal nickel from the group of nitrates . It usually occurs in the form of its hexahydrate Ni (NO ₃ ) ₂  · 6 H ₂ O, which is why all information in the table relates to this.

properties

Nickel (II) nitrate hexahydrate

Nickel (II) nitrate is a strong oxidizing agent and comes in various forms of hydrate. The most common is hexahydrate (Ni (NO ₃ ) ₂  · 6 H ₂ O). When the nickel (II) nitrate hexahydrate is slowly heated, the tetrahydrate (Ni (NO ₃ ) ₂  · 4 H ₂ O) is formed from 45 ° C and the dihydrate (Ni (NO ₃ ) ₂  · 2 H ₂ ) from 80 ° C O), at 120 to 145 ° C basic nickel nitrate. On cooling, the nonahydrate can form (Ni (NO ₃ ) ₂  · 9 H ₂ O). Above 200 ° C, nickel nitrate begins to decompose into nickel (II) oxide . With rapid heating between 310 and 340 ° C it decomposes to nickel (II) oxide, nitrogen oxides and oxygen .

By reacting dissolved nickel nitrate hexahydrate with ammonia water (conc.), Hexaammine nickel (II) nitrate, a complex salt, can be obtained at pH> 8 . Similarly, nickel nitrate hexahydrate and hydrazine hydrate Nickelhydrazinnitrat be won.

${\displaystyle \mathrm {Ni(NO_{3})_{2}\cdot 6\ H_{2}O+3\ N_{2}H_{4}\cdot H_{2}O\longrightarrow } }$ ${\displaystyle \mathrm {Ni(N_{2}H_{4})_{3}(NO_{3})_{2}+9\ H_{2}O} }$

The reaction of nickel nitrate solution with caustic soda or sodium hydroxide results in light- to apple-green nickel (II) hydroxide .

${\displaystyle \mathrm {Ni(NO_{3})_{2}+2\ NaOH\longrightarrow Ni(OH)_{2}+2\ NaNO_{3}} }$

use

Nickel (II) nitrate is used in the ceramics industry (as a brown pigment), in dyeing as a pickling agent , for electrolytic nickel plating, for obtaining nickel (II) oxide and for the production of pure catalyst nickel .

safety instructions

Nickel (II) nitrate has an oxidizing effect and is classified as carcinogenic.

Web links

Commons : Nickel (II) nitrate  - Collection of pictures, videos and audio files

Individual evidence

1. ↑ ^{a b c d e f g} Entry on nickel (II) nitrate in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
2. ↑ Entry on nickel dinitrate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
3. ↑ Data sheet Nickel (II) nitrate hexahydrate, 99.999% trace metals basis from Sigma-Aldrich , accessed on December 6, 2019 ( PDF ).
4. ↑ Swiss Accident Insurance Fund (Suva): Limits - Current MAK and BAT values (search for nickel salts, soluble ), accessed on March 4, 2020.