barium sulfate


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barium sulfate:

see baritebarite
, barytes
[New Lat., from barium], or heavy spar,
a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO4, found in nature as tabular crystals or in granular or massive form and has a high specific gravity.
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Barium Sulfate

 

BaSO4, a salt; colorless crystals with a density of 4.5 g/cm3 and a melting point of 1580° C. This compound is virtually insoluble in water (2 mg per liter at 18° C) but is highly soluble in concentrated H2SO4 as a result of the formation of a complex compound. Barium sulfate is found in nature in the form of the mineral barite, which is the principal raw material for production of barium and its compounds. It is a component of the white pigment lithopone and is included in high-quality paper (which gives it its whiteness and smoothness). Petroleum workers use barium sulfate as a weighting material in drilling deep wells. This compound absorbs X rays well and is therefore used in fluoroscopic examinations, particularly of the gastrointestinal tract.

barium sulfate

[′bar·ē·əm ′səl‚fāt]
(inorganic chemistry)
BaSO4 A salt occurring in the form of white, rhombic crystals, insoluble in water; used as a white pigment, as an opaque contrast medium for roentgenographic processes, and as an antidiarrheal.

barite

A mineral used in concrete as an aggregate, esp. for the construction of high-density radiation shielding; also called barium sulfate.
References in periodicals archive ?
This product should not be used in patients with known or suspected perforation of the GI tract, known obstruction of the GI tract, high risk of aspiration, or hypersensitivity to barium sulfate products.
Barium compounds that do not dissolve well, such as barium sulfate, are generally not harmful.
Comparison between a 10-mL Bencton & Dickinson (BD) and a 10-mL Saldanha Rodrigues (SR) syringe in the volume of barium sulfate remaining in the syringe after 10 seconds of flowing Barium sulfate (concentrations) 1g/3mL 1g/1mL 1g/1mL + 1.2g thickener MEAN (SD) MEDIAN MEAN (SD) MEDIAN MEAN (SD) MEDIAN BD 1.4 (0.1) 1.4 7.9 (0.2) 7.8 8.3 (0.1) 8.4 SR 4.3 (0.3) 4.2 9.4 (0.2) 9.4 9.6 (0.2) 9.7 p <0.01 <0.01 <0.01 SD: standard deviation; Man-Whitney test
Method 2 had the following advantages: (1) the NEP was localized using anatomical landmarks, which minimized damage to sensory fibers in the neural trunk; (2) barium sulfate combined with 801 glue was used to stain the NEP, and was easily visualized and eluted; (3) the puncture point for the NEP was successfully localized on the skin surface using curve measurements, which are both accurate and clinically feasible; (4) CT identified the puncture depth necessary to access the NEP; (5) distances were expressed as percentages, which reduces the influence of between-patient differences.
Precipitated barium Sulfate is a type of functional filler, which is widely utilized as a pigment extender in surface coating materials, and in the glass and rubber industries.
Crystal structure of barium sulfate on the mucosa (b) and in the infected fluid (c, d).
The compression coated tablet of barium sulfate was ingested by the healthy volunteers and X-rays were taken at different time intervals, that is, 0 hr, 2 hrs, 4 hrs, 6 hrs, 7 hrs, and 24 hrs.
A suspension of barium sulfate is produced in an aqueous solution and/or brackish water sample by the addition of barium chloride solution and the turbidity is monitored with the help of an immersed infrared sensor.
Experts from companies, including AkzoNobel, DuPont and Sachtleben, presented papers on the latest developments in "Green Coatings." Sachtleben received the "Green Raw Material Supplier Award," for its new functionalized barium sulfate product.
The procedure was carried out through the diluted barium sulfate strips pasted on compacted cellulose boardsheet, with different thicknesses.
Barium was estimated gravimetrically in the sample solution as barium sulfate.