Strontiumnitrat Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R22:Gesundheitsschädlich beim Verschlucken.
S-Sätze Betriebsanweisung:
S17:Von brennbaren Stoffen fernhalten.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
Strontium nitrate has the molecular formula of
Sr(NO3)2 and the molecular weight of 211.6327 g/mol.
Strontium nitrate is prepared by treating strontium
carbonate with nitric acid. The solution is evaporated
and crystallized:
SrCO3 +HNO3 ? Sr(NO3)2 + CO2 +H2O
Crystallization yields the tetrahydrate, Sr(NO3)2·
4H2O, which, on heating, melts at 31.3 °C in its own
waters of hydration and then decomposes >100 °C to
form the anhydrous nitrate. The anhydrate melts at
570 °C (It begins to decompose as low as 545 °C), is
soluble in water (70.3 gm/100 ml at 20 °C) and is
very slightly soluble in ethanol. These colorless crystals,
or white powder, have a density of 2.986 g/cm
3
and its CAS number is 10042-76-9. It is very soluble
in water, as shown in Table 4.11 on the following page. Strontium nitrate apparently forms only the tetrahydrate
when a solution is evaporated below 80°C.
Otherwise it decomposes at higher solution temperatures
to Sr(OH)2 and nitrogen oxides. The nitric acid
concentration makes little difference in the hydrate
produced, in contrast to other alkaline earths like Ca
and Mg.
Chemische Eigenschaften
Strontium nitrate is a white crystalline solid
Physikalische Eigenschaften
Colorless cubic crystals or white powder or granules; density 2.986 g/cm
3; melts at 570°C; very soluble in water, 80 g/100 mL at 18°C; very slightly soluble in ethanol.
The tetrahydrate constitutes colorless monoclinic crystals; density 2.20 g/cm
3; loses all water of crystallization at 100°C; converts to strontium oxide, SrO at 1,100°C; very soluble in water, 60.4g/100 mL at 0°C, 206 g/100 mL at 100°C; soluble in liquid ammonia; very slightly soluble in ethanol and acetone.
Verwenden
Strontium nitrate is used in pyrotechnics, for producing marine and railroad signals, and in matches.
synthetische
Strontium nitrate is prepared by treating strontium carbonate with nitric acid. The solution is evaporated and crystallized:
SrCO3 + HNO3 → Sr(NO3)2 + CO2 + H2O
Crystallization yields the tetrahydrate, Sr(NO3)2•4H2O, which on heating dehydrates to form the anhydrous nitrate.
Allgemeine Beschreibung
A white crystalline solid. Noncombustible but accelerates burning of combustible materials. May explode if large quantities are involved in a fire or the combustible material is finely divided. May explode under prolonged exposure to heat or fire. Toxic oxides of nitrogen are produced in fires. Used in pyrotechnics, in medicine, and to make other chemicals.
Air & Water Reaktionen
Soluble in water.
Reaktivität anzeigen
Mixtures of metal/nonmetal nitrates with alkyl esters may explode, owing to the formation of alkyl nitrates; mixtures a nitrate with phosphorus, tin (II) chloride, or other reducing agents may react explosively [Bretherick 1979 p. 108-109]. Special Hazards of Combustion Products: Yields toxic gaseous oxides of nitrogen when involved in fire.
Health Hazard
Dust is irritating to skin, eyes, and respiratory system.
Sicherheitsprofil
Moderately toxic by ingestion and intraperitoneal routes. A powerful oxidizer. When heated to decomposition it emits toxic fumes of NOx.See also NITRATES and STRONTIUM COMPOUNDS.
mögliche Exposition
Strontium nitrate is used in matches, pyrotechnics, marine signals; and railroad flares.
Versand/Shipping
UN1507 Strontium nitrate, Hazard Class: 5.1; Labels: 5.1-Oxidizer.
läuterung methode
Crystallise it from hot water (0.5mL/g) by cooling to 0o.
Inkompatibilitäten
A strong oxidizer. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Violent reaction with reducing agents; combustibles, organics, or other readily oxidizable materials. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides.
Strontiumnitrat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
