Zinc nitrate

Structural formula
	Zn 2+ 2
General
Surname	Zinc nitrate
Molecular formula	Zn (NO 3 ) 2
Brief description	colorless, crystalline solid
External identifiers / databases
EC number	231-943-8
ECHA InfoCard	100.029.039
PubChem	24518
ChemSpider	22926
Wikidata	Q204863
properties
Molar mass	189.39 g mol −1
Physical state	firmly
density	2.065 g cm −3 (hexahydrate, 20 ° C)
Melting point	25 ° C (hexahydrate, α-form); 36 ° C (hexahydrate, β-form); 45 ° C (tetrahydrate);
solubility	very light in water (1843 g l −1 at 20 ° C, hexahydrate)
safety instructions
H and P phrases	H: 272-302-315-319-335-410
	P: 273-302 + 352-305 + 351 + 338
Toxicological data	1190 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 .

Zinc nitrate [Zn (NO ₃ ) ₂ ] is the zinc salt of nitric acid .

Extraction and presentation

Zinc nitrate containing water is formed when zinc reacts with nitric acid.

{\ displaystyle \ mathrm {Zn + 2 \ HNO_ {3 \ (aq)} + 6H_ {2} O \ longrightarrow Zn (NO_ {3}) _ {2} \ cdot 6 \ H_ {2} O + H_ {2 } \ uparrow}}

On the other hand, anhydrous zinc nitrate cannot be obtained in this way. Instead, it is possible to obtain this by reacting nitrous tetroxide and zinc.

{\ displaystyle \ mathrm {2 \ Zn + 3 \ N_ {2} O_ {4} \ longrightarrow 2 \ Zn (NO_ {3}) _ {2} + N_ {2} \ uparrow}}

properties

Zinc nitrate is a colorless, oxidizing solid. It decomposes when heated, producing nitrogen oxides and zinc oxide and before that water of crystallization is given off above 105 ° C.

Several salts with different amounts of water of crystallization are known of zinc nitrate . The best known contains six equivalents of water (hexahydrate), but hydrates with two, four or nine water molecules are also known.

use

Zinc nitrate is used as a catalyst in the crease-proofing of textile goods, as a component of latex coagulation baths, in electroplating and in acetate fiber dyeing.

It is used as a bleaching and pickling agent , as well as for the extraction of other zinc compounds.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on zinc nitrate in the GESTIS substance database of the IFA , accessed on February 17, 2017(JavaScript required) .
↑ ^a ^b H. Schmit, C. Rathgeber, P. Hennemann, S. Hiebler: Three-step method to determine the eutectic composition of binary and ternary mixtures - Tested on two novel eutectic phase change materials based on salt hydrates. In: J. Therm. Anal. Calorim. 117, 2014, pp. 595-602.
↑ applichem: zinc nitrate hexahydrate

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Entry on zinc nitrate in the GESTIS substance database of the IFA , accessed on February 17, 2017(JavaScript required) .

[Schmit-2] H. Schmit, C. Rathgeber, P. Hennemann, S. Hiebler: Three-step method to determine the eutectic composition of binary and ternary mixtures - Tested on two novel eutectic phase change materials based on salt hydrates. In: J. Therm. Anal. Calorim. 117, 2014, pp. 595-602.

[3] : zinc nitrate hexahydrate