Magnesium nitrate

Structural formula
General
Surname	Magnesium nitrate
other names	MAGNESIUM NITRATE ( INCI )
Molecular formula	Mg (NO 3 ) 2; Mg (NO 3 ) 2 · 6H 2 O
Brief description	colorless and odorless solid
External identifiers / databases
EC number	233-826-7
ECHA InfoCard	100.030.739
PubChem	25212
ChemSpider	23415
Wikidata	Q411014
properties
Molar mass	148.3 g · mol -1; 256.4 g · mol -1 (hexahydrate)
Physical state	firmly
density	1.46 g cm −3 (hexahydrate)
Melting point	89 ° C (hexahydrate)
boiling point	Release of crystal water> 90 ° C; Decomposes at 330 ° C;
solubility	readily soluble in water (712 g l −1 at 25 ° C); readily soluble in water (hexahydrate 420 g l −1 at 20 ° C);
safety instructions
H and P phrases	H: 272
	P: 210-220-221-280-370 + 378-501
Toxicological data	5440 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 .

Magnesium nitrate is the magnesium salt of nitric acid . It is hygroscopic and has the molecular formula Mg (NO ₃ ) ₂ .

Occurrence

The hexahydrate of magnesium nitrate occurs naturally as the mineral nitromagnesite .

Manufacturing

Magnesium nitrate can be obtained by reacting magnesium with dinitrogen tetroxide in ethyl acetate .

{\ displaystyle \ mathrm {Mg + 2 \ N_ {2} O_ {4} \ longrightarrow Mg (NO_ {3}) _ {2} +2 \ NO}}

Magnesium nitrate results from the neutralization of magnesium hydroxide and nitric acid (see also titration , synthesis (chemistry) ).

{\ displaystyle \ mathrm {Mg (OH) _ {2} + 2HNO_ {3} \ longrightarrow Mg (NO_ {3}) _ {2} + 2H_ {2} O}}

It is also possible to react magnesium with nitric acid or by reacting magnesium hydroxide with ammonium nitrate .

properties

Magnesium nitrate is a colorless and odorless solid that is readily soluble in water. The hexahydrate has a monoclinic crystal structure with the space group P 2 ₁ / c (space group no. 14) . At 88.9 ° C this begins to give off its water of crystallization and the compound dissolves (melts) in it. Template: room group / 14

use

Magnesium nitrate is used as fertilizer , latent heat storage (as hexahydrate) or in the ceramic industry. It is also a building-damaging salt and is used in the dehydration of nitric acid (see also nitrates ).

safety instructions

Magnesium nitrate is labeled with the UN number 1474 and the hazard number 50 ( oxidizing / fire-promoting effect).

Web links

Individual evidence

↑ Entry on MAGNESIUM NITRATE in the CosIng database of the EU Commission, accessed on March 7, 2020.
↑ ^a ^b ^c ^d ^e ^f data sheet magnesium nitrate hexahydrate (PDF) from Merck , accessed on August 10, 2012.
↑ ^a ^b ^c ^d Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 217 ( limited preview in Google Book search).
↑ ^a ^b ^c ^d Entry on magnesium nitrate in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 912.

[CosIng-1] Entry on MAGNESIUM NITRATE in the CosIng database of the EU Commission, accessed on March 7, 2020.

[Merck-2] ↑ ^a ^b ^c ^d ^e ^f data sheet magnesium nitrate hexahydrate (PDF) from Merck , accessed on August 10, 2012.

[Richard_C._Ropp-3] Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 217 ( limited preview in Google Book search).

[GESTIS-4] Entry on magnesium nitrate in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .

[brauer-5] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 912.