CAS 7727-43-7 Barium Sulfate - Materials / Alfa Chemistry

NAVIGATION

Barium Sulfate

PRICE INQUIRY

Catalog Number

ACM7727437

CAS Number

7727-43-7

Product Name

Barium Sulfate

Structure

Category

Phosphors - Phosphor Materials; Ceramic Materials

Description

Barium sulfate appears as white or yellowish odorless powder or small crystals. Mp: 1580°C (with decomposition). Density: 4.25 -4.5 g cm-3. Insoluble in water, dilute acids, alcohol. Soluble in hot concentrated sulfuric acid. Used as a weighting mud in oil-drilling, in paints, paper coatings, linoleum, textiles, rubber. Administered internally ("barium cocktail") as a radio-opaque diagnostic aid.;DryPowder; Liquid; WetSolid; WetSolid, Liquid;ODOURLESS TASTELESS WHITE OR YELLOWISH CRYSTALS OR POWDER.;White or yellowish, odorless powder.;White or yellowish, odorless powder.

IUPAC Name

barium(2+);sulfate

Molecular Weight

233.39g/mol

Molecular Formula

BaO4S

Canonical SMILES

[O-]S(=O)(=O)[O-].[Ba+2]

InChI

InChI=1S/Ba.H₂O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2

InChI Key

TZCXTZWJZNENPQ-UHFFFAOYSA-L

Boiling Point

2912 °F at 760 mm Hg (Decomposes) (NIOSH, 2016);decomposes;2912°F (decomposes);2912°F (Decomposes)

Melting Point

1580°C

Purity

> 99.99%

Density

4.5

Solubility

water, 8470 mg/L @ 25 °C (est)

Appearance

White powder

Application

Barium sulfate serves a diverse range of purposes due to its unique properties, such as being odorless, tasteless, and virtually insoluble in water. It is primarily used as an inert filler and pigment extender in products like paints, primers, inks, plastics, floor tiles, paper coatings, polymer fibers, and rubber. This compound is also utilized in oil drilling as a thixotropic weighting mud, aiding in the stabilization of drilling operations. In the medical field, barium sulfate is notably used as a contrast agent for X-ray diagnostics, specifically in procedures like the barium meal, which enhances imaging of the upper gastrointestinal tract, including the esophagus, stomach, and small intestine. Additionally, barium sulfate is employed in the production of lithopone, a white pigment, and finds application in manufacturing photographic paper, wallpaper, glassmaking, battery plate expanders, and heavy concrete for radiation shielding. Due to its insolubility, barium sulfate is considered the least toxic among barium compounds, making it safe for various industrial and medical uses.

Assay

0.98

Average Particle Size

200-500 nm

Color/Form

Fine, heavy powder or polymorphous crystals;White, orthorhombic crystals;White or yellowish powder;Opaque powder

Complexity

62.2

Covalently-Bonded Unit Count

EC Number

231-784-4;236-664-5

Exact Mass

233.856977g/mol

Form

Nanodispersion (Water, IPA, Ethanol)

Formal Charge

Heavy Atom Count

ICSC Number

0827

MDL Number

MFCD00003455

MeSH Entry Terms

Barite;Baritop;Barium Sulfate;Barium Sulfate (2:1);E Z CAT;E-Z-CAT;EZCAT;Micropaque Oral;Sulfate, Barium

Monoisotopic Mass

233.856977g/mol

Odor

Odorless

Other Experimental

SOLUBILITY IN WATER INCREASES CONSIDERABLY IN PRESENCE OF CHLORIDE & OTHER ANIONS;1149 °C (transition point monoclinic);Lithopone does not darken in the presence of sulfides;Mohs hardness: 3.3;Heat of formation: -1473.2 kJ/mol; Gibbs energy of formation: -1362.2 kJ/mol; molar entropy: 132.2 J/mol-K; molar heat capacity: 101.8 J/mol-K

Packaging

25 ton

Refractive Index

Indices of refraction: 1.636 (alpha), 1.637 (beta), 1.648 (gamma)

Rotatable Bond Count

RTECS Number

CR0600000

Stability

Stable.

UNII

25BB7EKE2E

UN Number