Quecksilberdithiocyanat Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R26/27/28:Sehr giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R32:Entwickelt bei Berührung mit S?ure sehr giftige Gase.
R33:Gefahr kumulativer Wirkungen.
R50/53:Sehr giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
S-S?tze Betriebsanweisung:
S13:Von Nahrungsmitteln, Getr?nken und Futtermitteln fernhalten.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S60:Dieses Produkt und sein Beh?lter sind als gef?hrlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
Mercuric thiocyanate is an inorganic chemical substance. It is a stable solid at room temperature, and depending upon the purity, it appears as odourless white crystalline powder or grey. It is insoluble in water and denser than water and sinks in water. The solubility in alcohol and boiling H2O
and in KSCN solution is higher, in ether lower. Decomposes with
swelling on heating to 165°C. On decomposition, mercuric thiocyanate releases hazardous substances such as cyanide vapours, vapours of mercury, oxides of nitrogen (NO, NO2), and oxides of sulphur (SO2, SO3). Mercury thiocyanate has limited uses in chemical synthesis.
Verwenden
For Pharaoh's serpents (fireworks); intensifier in photography.
Air & Water Reaktionen
Insoluble in water.
Reaktivit?t anzeigen
MERCURIC THIOCYANATE decomposes into its elements at about 165°C. Burns readily in air to generate a coil of cohesive ash resembling a serpent (hence used in a firework: Pharaoh's serpents). Swells up to many times its original volume if heated [USCG, 1999]. Soluble in dilute hydrochloric acid [Merck]. Incompatible with strong oxidizing agents.
Hazard
Highly toxic by ingestion, inhalation, and
skin absorption.
Health Hazard
Mercuric thiocyanate causes severe eye and skin irritation with possible burns and causes digestive and respiratory tract irritation with possible burns. It may impair fertility, may cause harm to the unborn child, is harmful if inhaled, may cause allergic skin reaction, may cause kidney damage, may cause CNS effects, is light sensitive, and is a severe marine pollutant. Contact with acids liberates very toxic gas. The target organs include kidneys, CNS, reproductive system, eyes, and skin.
Sicherheitsprofil
A poison by ingestion
and intraperitoneal routes. Moderately toxic
by skin contact. Thermally unstable and
decomposition may be vigorous. When
heated to decomposition it emits very toxic
fumes of Hg, NOx, SOx, and CN-. See also
MERCURY COMPOUNDS and
CYANATES.
Synthese
A Hg(NO3)2
solution, acidified with a few drops of HNO3,
is treated with the stoichiometric amount of KSCN solution. The
resultant crystalline precipitate is suction-filtered and washed
with H2O. The product may be recrystallized from hot H2O or
alcohol. Yield 80%.
Hg(NO3)2 + 2 KSCN = Hg(SCN)2 + 2KNO3
m?gliche Exposition
Mercury thiocyanate is used in
photography and fireworks.
Versand/Shipping
UN1646 Mercury thiocyanate, Hazard Class:
6.1; Labels: 6.1-Poisonous materials.
l?uterung methode
Recrystallise it from H2O, and it can give various crystal forms depending on conditions. Its solubility in H2O is 0.069% at 25o, but is more soluble at higher temperatures. It decomposes to Hg above 165o. Poisonous. [Mason & Forgeng J Phys Chem 35 1121 1931, Birckenbach & Kolb Chem Ber 68 919 1935.]
Inkompatibilit?ten
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. Mercury thiocyanate is
sensitive to heat; expands to many times its original volume
and then decomposes at freezing/melting point forming
toxic fumes of sulfur oxides, mercury cyanide, and nitrogen
oxides. Contact with acid or acid fumes causes release
of toxic mercury and cyanide vapors. Incompatible with
chlorine, reducing agents such as hydrides, sulfides
Waste disposal
Small amounts may be
destroyed by alkaline hydrolysis. Admixture with alkali
can be followed by soil burial. Larger quantities can be
disposed of by incineration in admixture with acetone or
xylene and using effluent gas scrubbing. Do not reuse
empty container; proper disposal required.
Quecksilberdithiocyanat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
