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CAS NUMBER: 21109-95-5
EC NUMBER: 244-214-4
MOLECULAR FORMULA: BaS
MOLECULAR WEIGHT: 169.39
Barium sulfide is an inorganic compound that is used as a precursor in the production of barium compounds.
These compounds can be used in a variety of applications, such as ceramics, luminous paints, additives, and flame retardants.
Barium sulfide is the inorganic compound with the formula BaS.
This colorless salt is an important precursor to other barium compounds including BaCO3 and the pigment lithopone, ZnS/BaSO4.
Like other chalcogenides of the alkaline earth metals, BaS is a short wavelength emitter for electronic displays.
Barium sulfide is colorless, although like many sulfides, it is commonly obtained in impure colored forms.
Barium Sulfide is a moderately water and acid soluble Barium source for uses compatible with sulfates.
Barium sulfides are salts or esters of sulfuric acid formed by replacing one or both of the hydrogens with a metal.
Barium sulfides are readily soluble in water for uses such as water treatment, unlike fluorides and oxides which tend to be insoluble.
Barium sulfides are soluble in organic solutions and sometimes in both aqueous and organic solutions.
Metallic ions can also be dispersed utilizing suspended or coated nanoparticles and deposited utilizing sputtering targets and evaporation materials for uses such as solar energy materials and fuel cells.
Barium Sulfide is generally immediately available in most volumes.
High purity, submicron and nanopowder forms may be considered.
Barium sulfide is an important precursor to other barium compounds with applications from ceramics and flame retardants to luminous paints and additives, and recent research shows potential technological applications in electrical and optical devices.
Barium sulfide is a compound with many uses, both commercially and in the scientific research world.
Normally,
Barium sulfide is prepared from the high-temperature reduction of barite (BaSO4) with carbon, a process that eliminates CO2 as a by-product.
Temperatures during the reduction step can be as high as 1200 °C.
Barium sulfide belongs to the inorganic compound that possesses different characters, which allows it to be applied in a variety of fields.
Barium sulfide is primarily used as an important precursor to produce other barium compounds, such as barium carbonate as well as the pigment lithopone (ZnS•BaSO4).
Similar to other chalcogenides of the alkaline earth metals, barium sulfide can be employed as a short short wavelength emitter for electronic displays and used in electronics, paint pigments, dehairing hides, flame retardant, luminous paints, and producing pure hydrogen sulfide.
Besides, barium sulfide is effective to deviate X-rays and helps to give clearly image of the soft tissue.
Barium sulfide is employed as a phosphor host lattice.
Barium sulfide has been used as a sintering aid for zinc sulfide ceramics.
Barium Sulfide is an inorganic salt.
USES OF BARIUM SULFIDE:
As depilatory; in luminous paints; manufacture of lithopone; vulcanizing rubber, generating H2S.
Barium sulfide is used as source for preparing other barium compounds such as the barium carbonate or barium sulfate.
Barium sulfide is particularly used in the preparation of the pigment lithopone, which is a mixture of barium sulfate and zinc sulfide.
To be used in the manufacturing of pigments,
Barium sulfide should be in a pure form, due to some impurities can give color to the material.
Barium sulfide is also used in the manufacturing of electronic devices for being a short wavelength emitter.
-Used to remove hair and to make luminous paints,
-lithopone,
-vulcanized rubber;
-Used for dehiding,
-flame retarding,
-as a paint additive;
-Used in metallic patinas;
FUNCTION OF BARIUM SULFIDE:
-depilating agent and depilatory
PRODUCTION AND PROPERTIES OF BARIUM SULFIDE:
Barium sulfide was prepared by the Italian alchemist Vincentius (or Vincentinus) Casciarolus (or Casciorolus, 1571-1624) via the thermo-chemical reduction of BaSO4 (available as the mineral barite).
Barium sulfide is currently manufactured by an improved version of Casciarolus's process using coke in place of flour and charcoal.
The basic method remains in use today.
Barium sulfide dissolves in water. These aqueous solutions, when treated with sodium carbonate or carbon dioxide, give a white solid of barium carbonate, a source material for many commercial barium compounds.
According to Harvey (1957), in 1603, Vincenzo Cascariolo used barite, found at the bottom of Mount Paterno near Bologna, in one of his non-fruitful attempts to produce gold.
After grinding and heating the mineral with charcoal under reducing conditions, he obtained a persistent luminescent material rapidly called Lapis Boloniensis, or Bolognian stone.
The phosphorescence of the material obtained by Casciarolo made it a curiosity.
Barium sulfide crystallizes with the NaCl structure, featuring octahedral Ba2+ and S2− centres.
The observed melting point of barium sulfide is highly sensitive to impurities.
Barium sulfide has the molecular formula of BaS and the molecular weight of 169.3942 g/mol.
CHEMICAL PROPERTIES OF BARIUM SULFIDE:
colourless crystals, or white to grey-brown powder,
Barium sulfide exhibits the characteristic properties of other sulfides; it shows interesting behavior against the light.
First, barium sulfides can deviate X-rays, so it is used in biomedical application to check tissues in details.
Barium sulfide can also emit in short wavelength, so it is used in electronics equipments.
PHYSICAL PROPERTIES OF BARIUM SULFIDE:
Colorless crystalline solid; density 4.25 g/cm3; refractive index 2.155; melts at 1,200°C; soluble in water (decomposes); insoluble in alcohol.
Barium sulfide is a white solid.
Barium sulfide is phosphorescent.
The density of this salt is 4.25 g/mL.
Barium sulfides melting point is 2235 °C and above this temperature, it decomposes.
Barium sulfide is slightly soluble in cold water but it is highly solubility in hot water.
Barium sulfide is insoluble in ethanol and organic solvents.
PROPERTIES OF BARIUM SULFIDE:
-Quality Level: 100,
-assay: 99.9%
-reaction suitability: reagent type: catalyst, core: barium
-density: 4.25 g/mL at 15 °C (lit.)
-SMILES string: S=[Ba]
-InChI: 1S/Ba.S
-InChI key: OTMNKCRTGBGNPN-UHFFFAOYSA-N
-Melting Point: 1,200° C (2,192° F)
-Density: 4.25 g/cm3
-Appearance: Powder
OCCURRENCE:
Barium sulfide occurs in the form of black ash, which is a gray to black impure product obtained from high temperature carbonaceous reduction of barite.
Barium sulfide is the starting material in the manufacture of most barium compounds including barium chloride and barium carbonate.
Barium sulfide is used in luminous paints; for dehairing hides; as a flame retardant; and for generating H2S.
PRODUCTION METHOD OF BARIUM SULFIDE:
Barium sulfide is grayish-white solid, formed by heating barium sulfate and carbon, reactive with H2O to form barium hydrosulfide, Ba(SH)2, solution.
The latter is also made by saturation of barium hydroxide solution with H2S.
Barium sulfides are formed by boiling barium hydrosulfide with sulfur.
PREPARATION OF BARIUM SULFIDE:
Barium sulfide is prepared commercially by heating barite (BaO) with coal or petroleum coke in a rotary kiln at 1000°C to 1250°C in an oxygen-free atmosphere.
SYNONYM:
Bariumpolysulfid
Bariumpolysulfid [German]
Barium sulfide (BaS), black
Barium sulfide, black
EINECS 256-814-3
EINECS 232-376-9
barium(2+);sulfide
50864-67-0
[BaS]
Barium sulfide(bas),black
CHEBI:32590
DTXSID30892157
Q411656
