ARSENIC (III) SULFIDE

ARSENIC (III) SULFIDE Basic information
Product Name:ARSENIC (III) SULFIDE
Synonyms:Arsenic(III) sulfide, 99.9% (metals basis);Arsenic(III) sulfide, 99.999% (metals basis);Nickel Antimony Titanate Yellow;Arsenic(III) sulfide (As2S3);Arsenic(III) sulfide, 99.999% trace metals basis;Arsenic(III) sulfide, 99.9% trace metals basis;ARSENIC TRISULFIDE, PRACT;ai3-01006
CAS:1303-33-9
MF:As2S3
MW:246.04
EINECS:215-117-4
Product Categories:metal chalcogenides;Inorganics;UVCBs-inorganic
Mol File:1303-33-9.mol
ARSENIC (III) SULFIDE Structure
ARSENIC (III) SULFIDE Chemical Properties
Melting point 300 °C(lit.)
Boiling point 707 °C
density 3.43 g/mL at 25 °C(lit.)
Fp 707°C
storage temp. Poison room
form Powder
Specific Gravity3.43
color Yellow to orange
Water Solubility Insoluble in water. Soluble in alkali sulfides or carbonate, hot HCl
Sensitive moisture sensitive
Merck 14,806
Solubility Product Constant (Ksp)pKsp: 21.68
Exposure limitsACGIH: TWA 0.01 mg/m3
NIOSH: IDLH 5 mg/m3; Ceiling 0.002 mg/m3
CAS DataBase Reference1303-33-9(CAS DataBase Reference)
EPA Substance Registry SystemArsenic trisulfide (1303-33-9)
Safety Information
Hazard Codes T,N
Risk Statements 23/25-50/53
Safety Statements 20/21-28-45-60-61
RIDADR UN 1557 6.1/PG 2
WGK Germany 3
RTECS CG2638000
TSCA Yes
HazardClass 6.1
PackingGroup III
HS Code 2813909000
Hazardous Substances Data1303-33-9(Hazardous Substances Data)
Toxicitymouse,LD50,intraperitoneal,215mg/kg (215mg/kg),LUNGS, THORAX, OR RESPIRATION: DYSPNEABEHAVIORAL: MUSCLE WEAKNESSGASTROINTESTINAL: “HYPERMOTILITY, DIARRHEA”,Gigiena Truda i Professional’nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 28(7), Pg. 53, 1984.
MSDS Information
ProviderLanguage
ACROSEnglish
SigmaAldrichEnglish
ALFAEnglish
ARSENIC (III) SULFIDE Usage And Synthesis
Chemical PropertiesArsenic trisulfide is a noncombustible, odorless, yellow or orange powder or red needles (changes to a different “red” form @ 170 C).
Chemical Propertiesyellow to orange powder
Physical propertiesYellow or orange monoclinic crystal or powder; a red allotrope modification also known; density 3.46 g/cm3; melts at 310°C; boils at 707°C; insoluble in water; soluble in liquid ammonia and alkalies.
OccurrenceArsenic sesquisulfide occurs in nature as the mineral orpiment. It is used as a pigment; in the manufacture of infrared-transmitting glass; in semiconductors and photoconductors; in pyrotechnics; in linoleum and oil cloth; for the removal of hairs from hides; and as a reducing agent.
UsesArsenic(III) sulfide is used in the treatment of acute promyelocytic leukemia. It is an inorganic photoresist used in the fabrication of photonic crystals and 3-D nanostructures. It is also used as an acousto-optic material, pigment, tanning agent and chalcogenide glass for infrared optics. Further, it is used as an analytical test for presence of dissimilatory arsenic-reducing bacteria (DARB).
Usesmanufacture of glass, particularly infrared-transmitting glass; manufacture of oil cloth, linoleum; in electrical semiconductors, photoconductors; as pigment; for depilating hides; in pyrotechnics.
PreparationArsenic sesquioxide may be prepared by heating arsenic trioxide with hydrogen sulfide:
As2O3 + 3 H2S → As2S3 + 3 H2O
Alternatively, it may be precipitated out from a solution of arsenous acid or arsenic trioxide in dilute hydrochloric acid by passing hydrogen sulfide into the solution:
2H3AsO3 + 3H2S → As2S3 + 6H2O.
General DescriptionA yellow or red crystalline solid or powder. Combustible. Insoluble in water. Toxic by inhalation (dust) and ingestion.
Air & Water ReactionsInsoluble in water.
Reactivity ProfileARSENIC (III) SULFIDE is dissolved by alkalis and by hydrochloric acid (slowly). Decomposed by nitric acid. May react with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. The reactions may be violent. ARSENIC (III) SULFIDE reacts with concentrated solutions of chloric acid with incandescence [Mellor Supp. II Part I:584 1956]. Generates toxic gaseous hydrogen sulfide on contact with acids.
Health Hazard(Acute and sub-acute poisoning are not common.) Repeated inhalation causes irritation of nose, laryngitis, mild bronchitis. Ingestion causes weakness, loss of appetite, gastrointestinal disturbances, peripheral neuritis, occasional hepatitis. Contact with eyes causes irritation. Irritates skin, especially where moist; if not treated, may cause ulceration.
Fire HazardCombustible material: may burn but does not ignite readily. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Industrial usesAs2S3 (orpiment) and As2S2 (realgar) have been used as early as 2000 BC as drugs, for example, to cure cancerous tumours, ulcers and other diseases of the time. Later, Galen (130 200 AD) recommended the application of a paste of arsenic sulfide against ulcers.
Safety ProfileConfirmed human carcinogen with experimental tumorigenic data. A poison. Reacts violently with H202, (m03 + S). When heated to decomposition or on contact with acid or acid fumes it emits highly toxic fumes of S02, H2S, and As. Reacts with water or steam to emit toxic and flammable vapors.
Potential ExposureArsenic trisulfide is used in the manufacture of glass, oil cloth, linoleum, electrical semiconductors, fireworks and used as a pigment.
ShippingUN1557 Arsenic compounds, solid, n.o.s. inorganic, including arsenates, n.o.s.; arsenites, n.o.s.; arsenic sulfides, n.o.s.; and organic compounds of arsenic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
IncompatibilitiesA strong reducing agent; avoid contact with oxidizers (such as perchlorates, peroxides, permanganates, chlorates, and nitrates) and potassium nitrate mixed with sulfur, since violent reactions occur. Water contact forms hydrogen sulfide. Incompatible with acids, halogens. Contact with acids or acid mists releases deadly arsine gas.
Waste DisposalConsult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal.
ARSENIC (III) SULFIDE Preparation Products And Raw materials
Raw materialsMetatitanic acid–>Rutile–>realgar
Preparation ProductsPigment yellow 37 (C.I. 77199)–>（Strontium-Calcium) Chrome Yellow

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