Information about Barium Sulfate
) Chemical structure of barium sulfate | |
| Barium Sulfate | |
| CAS number [7727-43-7] | ATC code V08BA01 |
| Chemical formula | BaSO4 |
| Molar mass | 233.43 g/mol |
| Specific gravity | 4.5 |
| Bioavailability | negligible orally |
| Melting point | 1580°C |
| Density | 4.5 g/cm3 |
| Solubility in water | 0.00115 g/L (18°C) |
| Solubility Product in water | 1.08×10-10 (25°C) |
| RTECS number | CR060000 tlh;lhlllllltl#rh0 |
Uses
Radiocontrast agent
Barium sulfate is frequently used clinically as a radiocontrast agent for X-ray imaging and other diagnostic procedures. It is most often used in imaging of the GI tract during what is colloquially known as a 'Barium meal'.It is administered, orally or by enema, as a suspension of fine particles in an aqueous solution (often with sweetening agents added). Although barium is a heavy metal, and its water-soluble compounds are often highly toxic, the extremely low solubility of barium sulfate protects the patient from absorbing harmful amounts of the metal. Barium sulfate is also readily removed from the body, unlike Thorotrast, which it replaced. Due to its relatively high atomic number (Z = 56) of barium, its compounds absorb X-rays more strongly than compounds derived from lighter nuclei.
Pigment
Barium sulfate mixtures are used as white pigment for paints. The combination of barium sulfate and zinc sulfide (ZnS) is called lithopone. Barium sulfate itself is called blanc fixe. It replaced white lead due to the latter's toxicity.Pyrotechnics
Barium sulfate is also used as a high temperature oxidizer in certain pyrotechnic formulas, as bariums compounds emit a green colored light when burned. Barium nitrate is more common in green pyrotechnic formulas, as it contains an oxidizer while still producing green colored light.Other uses
Barium sulfate is used as a filler in plastics and as a component of oil well drilling fluid to increase the density.It is used in brake linings, acoustic foams and powder coatings
Barium sulfate is also used during the procedure of the soil pH test. In this test it is used so that it precipitates out any particles (usually clay particles) which would otherwise 'cloud' solution preventing one from seeing the colour of the pH indicator i.e. the result of the test.
It is used in root canal filling.
In colorimetry barium sulphate is used as a near-perfect diffuser when measuring light sources.
History
Barium sulfate is reduced to barium sulfide by carbon. The accidental discovery of this conversion many centuries ago led to the discovery of the first synthetic phosphor (Hollman and Wiberg, 2001). The sulfide, unlike the sulfate, is water soluble.References
- Holleman, A. F. and Wiberg, E. (2001) Inorganic Chemistry, San Diego, CA : Academic Press, ISBN 0-12-352651-5
CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. They are also referred to as CAS numbers, CAS RNs or CAS #s.
..... Click the link for more information.
..... Click the link for more information.
The Anatomical Therapeutic Chemical Classification System is used for the classification of drugs. It is controlled by the WHO Collaborating Centre for Drug Statistics Methodology, and was first published in 1976.
..... Click the link for more information.
..... Click the link for more information.
A chemical formula is a concise way of expressing information about the atoms that constitute a particular chemical compound. A chemical formula is also a short way of showing how a chemical reaction occurs.
..... Click the link for more information.
..... Click the link for more information.
Molar mass, symbol M,[1] is the mass of one mole of a substance (chemical element or chemical compound).[2] It is a physical property which is characteristic of each pure substance.
..... Click the link for more information.
..... Click the link for more information.
This article requires authentication or verification by an expert.
Please assist in recruiting an expert or [ improve this article] yourself. See the talk page for details. This article has been tagged since November 2006.
..... Click the link for more information.
Please assist in recruiting an expert or [ improve this article] yourself. See the talk page for details. This article has been tagged since November 2006.
..... Click the link for more information.
In pharmacology, bioavailability is used to describe the fraction of an administered dose of unchanged drug that reaches the systemic circulation, one of the principal pharmacokinetic properties of drugs.
..... Click the link for more information.
..... Click the link for more information.
The melting point of a crystalline solid is the temperature range at which it changes state from solid to liquid. Although the phrase would suggest a specific temperature and is commonly and incorrectly used as such in most textbooks and literature, most crystalline compounds
..... Click the link for more information.
..... Click the link for more information.
In physics, density is mass m per unit volume V—how heavy something is compared to its size. A small, heavy object, such as a rock or a lump of lead, is denser than a lighter object of the same size or a larger object of the same weight, such as pieces of
..... Click the link for more information.
..... Click the link for more information.
Solubility is a physical property referring to the ability for a given substance, the solute, to dissolve in a solvent.[1] It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.
..... Click the link for more information.
..... Click the link for more information.
Water (H2O, HOH) is the most abundant molecule on Earth's surface, composing of about 70% of the Earth's surface as liquid and solid state in addition to being found in the atmosphere as a vapor.
..... Click the link for more information.
..... Click the link for more information.
Solubility equilibrium is any chemical equilibrium between solid and dissolved states of a compound at saturation.
Solubility equilibria involve application of chemical principles and constants to predict solubility of substances under specific conditions (because
..... Click the link for more information.
Solubility equilibria involve application of chemical principles and constants to predict solubility of substances under specific conditions (because
..... Click the link for more information.
Water (H2O, HOH) is the most abundant molecule on Earth's surface, composing of about 70% of the Earth's surface as liquid and solid state in addition to being found in the atmosphere as a vapor.
..... Click the link for more information.
..... Click the link for more information.
Registry of Toxic Effects of Chemical Substances (RTECS) is a database of toxicity information compiled from the open scientific literature without reference to the validity or usefulness of the studies reported.
..... Click the link for more information.
..... Click the link for more information.
Barium (IPA: /ˈbɛːɹiəm/) is a chemical element. It has the symbol Ba, and atomic number 56. Barium is a soft silvery metallic alkaline earth metal.
..... Click the link for more information.
..... Click the link for more information.
Solubility is a physical property referring to the ability for a given substance, the solute, to dissolve in a solvent.[1] It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.
..... Click the link for more information.
..... Click the link for more information.
Water is a common chemical substance that is essential to all known forms of life.[1] In typical usage, water refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor.
..... Click the link for more information.
..... Click the link for more information.
Sulfuric (or sulphuric) acid, H2SO4, is a strong mineral acid. It is soluble in water at all concentrations. It was once known as oil of vitriol, coined by the 8th-century Arabian alchemist Jabir ibn Hayyan (Geber) after his discovery of the chemical.
..... Click the link for more information.
..... Click the link for more information.
Barite (BaSO4) is a mineral consisting of barium sulfate. It is generally white or colorless, and is the main source of barium. Baryte is the British spelling, and the mineral is also called heavy spar.
..... Click the link for more information.
..... Click the link for more information.
- See also:
..... Click the link for more information.
X-rays (or Röntgen rays) are a form of electromagnetic radiation with a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 PHz to 30 EHz. X-rays are primarily used for diagnostic radiography and crystallography.
..... Click the link for more information.
..... Click the link for more information.
- See also: Radiology, Radiography
..... Click the link for more information.
gastrointestinal tract (GI tract), also called the digestive tract, or the alimentary canal, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste.
..... Click the link for more information.
..... Click the link for more information.
A barium meal, also known as an upper gastrointestinal series is a procedure in which radiographs of the esophagus, stomach and duodenum are taken after barium sulfate is ingested by a patient.
..... Click the link for more information.
..... Click the link for more information.
enema (plural enemata or enemas) is the procedure of introducing liquids into the rectum and colon via the anus. Enemas can be carried out for medical reasons (as a treatment for constipation), as a remedy for encopresis, as part of alternative health therapies, and
..... Click the link for more information.
..... Click the link for more information.
For other uses, see Heavy metal (disambiguation).
A heavy metal is any of a number of higher atomic weight elements, which has the properties of a metallic substance at room temperature...... Click the link for more information.
Thorotrast is a suspension containing particles of the radioactive compound thorium dioxide, ThO2, used as a contrast medium in X-ray diagnostics in the 1930s and 40s (use in some countries, such as the U.S., continued into the 1950s[1]).
..... Click the link for more information.
..... Click the link for more information.
See also: List of elements by atomic number
In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. It is traditionally represented by the symbol Z.
..... Click the link for more information.
In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. It is traditionally represented by the symbol Z.
..... Click the link for more information.
Zinc sulfide (or zinc sulphide) is a chemical compound with the formula ZnS. Zinc sulfide is a white to yellow colored powder or crystal. It is typically encountered in the more stable cubic form, known also as the mineral sphalerite.
..... Click the link for more information.
..... Click the link for more information.
Lithopone is a white pigment, a mixture of barium sulfate and zinc sulfide. It is used in interior paints and in some enamels.
Wooden artifacts are treated with zinc sulphate and barium sulfide, which undergo ion exchange reaction to form the aforementioned precipitates,
..... Click the link for more information.
Wooden artifacts are treated with zinc sulphate and barium sulfide, which undergo ion exchange reaction to form the aforementioned precipitates,
..... Click the link for more information.
Barium sulfate (or barium sulphate) is a white crystalline solid with the chemical formula BaSO4. It is poorly soluble in water and other traditional solvents but is soluble in concentrated sulfuric acid.
..... Click the link for more information.
..... Click the link for more information.
This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus
