PHOSPHORUS SESQUISULFIDE

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CAS:1314-85-8
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CAS:1314-85-8
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CAS:1314-85-8
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CAS:1314-85-8
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Products Intro: Product Name:PHOSPHORUS SESQUISULFIDE
CAS:1314-85-8
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PHOSPHORUS SESQUISULFIDE Basic information
Product Name:PHOSPHORUS SESQUISULFIDE
Synonyms:PHOSPHORUS SESQUISULFIDE;Tetraphosphorus trisulfide;3,5,7-trithia-1,2,4,6-tetraphosphatricyclo[2.2.1.02,6]heptane;P4-S3;Phosphorous sesquisulfide;phosphoroussesquisulfide;phosphoroussesquisulfide[qr];Phosphorus (iii) sulfide
CAS:1314-85-8
MF:P4S3
MW:220.09
EINECS:215-245-0
Product Categories:Inorganics
Mol File:1314-85-8.mol
PHOSPHORUS SESQUISULFIDE Structure
PHOSPHORUS SESQUISULFIDE Chemical Properties
Melting point 172.5°
Boiling point bp 407.5°
density d420 2.03
vapor pressure 0Pa at 25℃
solubility insoluble in H2O; soluble in benzene; very soluble in CS2
form solid
color yellow-green orthorhombic crystals, crystalline
Water Solubility 29.3mg/L at 20℃
EPA Substance Registry System3,5,7-Trithia-1,2,4,6-tetraphosphatricyclo[2.2.1.02,6]heptane (1314-85-8)
Safety Information
Hazard Codes F,Xn,N
Risk Statements 11-22-50
Safety Statements 7-16-24/25-61
RIDADR 1341
RTECS TH4330000
HazardClass 4.1
PackingGroup II
Hazardous Substances Data1314-85-8(Hazardous Substances Data)
Toxicityrabbit,LDLo,oral,95mg/kg (95mg/kg),BEHAVIORAL: FOOD INTAKE (ANIMAL)KIDNEY, URETER, AND BLADDER: OTHER CHANGES IN URINE COMPOSITIONKIDNEY, URETER, AND BLADDER: CHANGES IN BOTH TUBULES AND GLOMERULI,Skandinavisches Archiv fuer Physiologie. Vol. 15, Pg. 259, 1904.
MSDS Information
PHOSPHORUS SESQUISULFIDE Usage And Synthesis
Chemical PropertiesYellowish-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
UsesIn match tips.
UsesPhosphorus sesquisulfide is used in in match tips.
UsesPhosphorus sesquisulfide is used in making safety matches.
General DescriptionA 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 ReactionsHighly flammable.Slowly decomposed by water to form phosphoric acid and toxic hydrogen sulfide gas (H2S). May ignite on contact with water or moist air.
Reactivity ProfilePHOSPHORUS SESQUISULFIDE is a reducing agent.
Health HazardHighly toxic: contact with water produces toxic gas, may be fatal if inhaled. Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death. May produce corrosive solutions on contact with water. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution.
Health HazardPhosphorus 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.
Fire HazardProduce 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.
Flammability and ExplosibilityFlammable
Safety ProfilePoison by ingestion. Flammable by spontaneous ignition. When heated to decomposition it emits very toxic fumes of POx and SOx. See also SULFIDES and PHOSPHORUS.
SynthesisPhosphorus 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
Purification MethodsExtract 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 DisposalAn alkaline solution is treated with laundry bleach, allowed to stand overnight, neutralized, and washed down the drain with plenty of water.
PHOSPHORUS SESQUISULFIDE Preparation Products And Raw materials
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