Tetraphosphortrisulfid Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R11:Leichtentzündlich.
R22:Gesundheitssch?dlich beim Verschlucken.
R50:Sehr giftig für Wasserorganismen.
S-S?tze Betriebsanweisung:
S7:Beh?lter dicht geschlossen halten.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
Yellowish-green crystals; long rhombic needles; melts at 172°C (341°F); boils at 407–408°C (764–766°F);density 2.03 at 20°C (68 °F); soluble in carbon disulfide, benzene, and toluene, reacts with water.
Stable in the air. In the absence of O2 and
moisture, remains stable above 700°C. Decomposed by water at
elevated temperatures, evolving H3S. Soluble in CS3 and benzene.
These solutions become turbid in air almost immediately and
gradually deposit a copious, yellowish-white precipitate
Verwenden
Phosphorus sesquisulfide is used in making safety matches.
Allgemeine Beschreibung
A yellow crystalline solid. Easily ignited by friction. Forms sulfur dioxide and phosphorus pentaoxide during combustion. Reacts with water to form phosphoric acid, a corrosive material. Used to make matches and in the manufacture of other chemicals.
Air & Water Reaktionen
Highly flammable.Slowly decomposed by water to form phosphoric acid and toxic hydrogen sulfide gas (H2S). May ignite on contact with water or moist air.
Reaktivit?t anzeigen
PHOSPHORUS SESQUISULFIDE is a reducing agent.
Health Hazard
Phosphorus sesquisulfide exhibited low to moderate acute oral toxicity in animals. An oral dose lethal to rabbits was reported to be 100 mg/kg (NIOSH 1986). Because of its low vapor pressure, any health hazard due to inhalation of this compound in the work place should be very low. There is no report on its acute inhalation toxicity. Its vapors may produce irritation of respiratory passage. Skin contact may cause mild irritation. It produces toxic sulfur dioxide on burning.
Brandgefahr
Produce flammable and toxic gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Containers may explode when heated. Runoff may create fire or explosion hazard.
Sicherheitsprofil
Poison by ingestion.
Flammable by spontaneous ignition. When
heated to decomposition it emits very toxic
fumes of POx and SOx. See also SULFIDES
and PHOSPHORUS.
Synthese
Phosphorus trisulfide can be synthesized either by Stock's method
(I), which involves fusing red P and S and carefully purifying the
crude product by recrystallization from CS3, followed by a second
recrystallization from benzene, or according to German patent
309,618 (F. C. Frary), which uses white P in a high-melting
inert solvent (II).
4 P + 3 S = P4S3
l?uterung methode
Extract P4S3with CS2, filter it and evaporate it to dryness. Alternatively place it in H2O, and pass steam through it for an hour. The H2O is then removed, the solid is dried, and recrystallised from CS2 [Rogers & Gross J Am Chem Soc 74 5294 1952].
Waste disposal
An alkaline solution is treated with laundry bleach, allowed to stand overnight, neutralized, and washed down the drain with plenty of water.
Tetraphosphortrisulfid Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
