PRODUCT Properties
| Melting point: | 648 °C(lit.) |
| Boiling point: | 1090 °C(lit.) |
| Density | 0.889 g/mL at 25 °C |
| vapor pressure | 1 mm Hg ( 621 °C) |
| RTECS | OM3756000 |
| Flash point: | −26 °F |
| solubility | H2O: soluble |
| form | turnings |
| color | white cubic crystals, crystalline |
| Water Solubility | Freely soluble in water. Moderately soluble in ethanol and ammonia. |
| Sensitive | Hygroscopic |
| Merck | 13,5697 |
| Exposure limits | ACGIH: TWA 2 ppm; STEL 4 ppm OSHA: TWA 2 ppm(5 mg/m3) NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3) |
Description and Uses
Magnesium nitrate has the molecular formula of
Mg(NO3)2 and the molecular weight of 148.3152 g/
mol.
Magnesium nitrate is prepared by the action of nitric
acid on magnesium carbonate, oxide or hydroxide:
MgCO3 + 2HNO3 ? Mg(NO3)2 + CO2 +H2O
Mg(OH)2 + 2HNO3 ? Mg(NO3)2 + 2H2O
The salt crystallizing at room temperature after
evaporation is the hexahydrate, Mg(NO3)2·6H2O. Two
stable hydrates are formed, the hexahydrate [CAS
number =13446-18-9] and the dihydrate, Mg(NO3)2·
2H2O [CAS number = 15750-45-5].
It is used in printing, chemical, agriculture and ceramics industries. Its fertilizer grade has 10.5% nitrogen and 9.4% magnesium.
Safety
| Symbol(GHS) |   GHS03,GHS07 |
| Hazard statements | H272-H315-H319-H335 |
| Precautionary statements | P210a-P220-P221-P305+P351+P338-P405-P501a |
| Hazard Codes | C,Xi,O |
| Risk Statements | 34-36/37/38-8-36/38-35 |
| Safety Statements | 43-7/8-26-17-36-45-36/37/39 |
| RIDADR | UN 2056 3/PG 2 |
| WGK Germany | - |
| TSCA | Yes |
| HazardClass | 5.1 |
