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Topic: Barium sulphate


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In the News (Mon 22 Apr 19)

  
  Barium - LoveToKnow 1911
Barium chloride, BaCl 2.2H 2 O, can be obtained by dissolving witherite in dilute hydrochloric acid, and also from heavy spar by ignition in a reverberatory furnace with a mixture of coal, limestone and calcium chloride, the barium chloride being extracted from the fused mass by water, leaving a residue of insoluble calcium sulphide.
Barium sulphate, BaSO 4, is the most abundant of the naturally occurring barium compounds (see Barytes) and can be obtained artificially by the addition of sulphuric acid or any soluble sulphate to a solution of a soluble barium salt, when it is precipitated as an amorphous white powder of specific gravity 4.5.
Barium carbonate, BaCO 31 occurs rather widely distributed as witherite, and may be prepared by the addition of barium chloride to a hot solution of ammonium carbonate, when it is precipitated as a dense white powder of specific gravity 4.3; almost insoluble in water.
www.1911encyclopedia.org /Barium   (1491 words)

  
 Barium
Barium is a metallic element that is chemically similar to calcium, yet is soft and in its pure form is silvery white resembling lead.
Barium is primarily used in sparkplugs, vacuum tubes, fireworks, and in fluorescent lamps.
Barium (Greek "barys" meaning "heavy") was first identified in 1774 by Carl Scheele and extracted in 1808 by Sir Humphry Davy in England.
www.ebroadcast.com.au /lookup/encyclopedia/ba/Barium.html   (474 words)

  
 Barium sulfate - Wikipedia, the free encyclopedia
The mineral barite is composed largely of barium sulfate and is a common ore of barium.
Barium sulfate mixtures are used as white pigment for paints, when combined with zinc sulfide (ZnS) it is called lithopone, when combined with sodium sulfate (Na) it is called blanc fixe although blance fixe is also the name given to pure precipitated barium sulphate.
Barium sulfate is used as a filler in plastics and as a component of oil well drilling fluid to increase the density.
en.wikipedia.org /wiki/Barium_sulfate   (411 words)

  
 Ceramics Today - Articles
Barium compounds are not reputed to penetrate by skin unless the cutaneous barrier is broken as in chemical burns; a case has been described in the relevant medical literature which had been caused by barium chloride in fusion.
Handling of pulverulent barium sulphate was accompanied, at the time of already old observations, by benign pneumonias generally resulting in pulmonary radiological images consisting of nodules disseminated in both lung fields without clinical symptoms, nor anomalies of respiratory functional tests, it is barytosis.
The TLV for barium sulphate dust (insoluble) is 10 mg/m3.
www.ceramicstoday.com /articles/barium_english.htm   (1226 words)

  
 Name Origin
Barium compounds that do not dissolve well in water are not harmful and are even used by doctors for medical purposes.
Barium is used as a “scavenger” for oxygen in vacuum tubes.
Barium Sulphate is used as a shield to prevent the emission of high intensity radiation from television screens.
www.carondelet.pvt.k12.ca.us /Family/Science/AEM/Barium4.htm   (433 words)

  
 [No title]
Although the blocking affects of barium seems to be instantaneous, application of long voltage pulses revealed a second, slow component to the effect of extracellular barium ions.
Barium had no significant effect on the mean acceleratory phase or on the secondary increase in atrial interval that followed the acceleratory phase (Fig.
The concentration of barium was adjusted to cause a 100-ms increase in the resting atrial cycle length and was continued during the time that vagal-effect curves were generated.
www.lycos.com /info/barium.html   (550 words)

  
 Barium
Barium carbonate is used in the ceramics and glass industry as well as to combat rodents in agriculture.
Humans/mammals: All soluble barium compounds are poisonous and readily resorbed in the gastro-intestinal tract and subsequently accumulated in the bones.
Whereas barium hydroxide is highly caustic since it forms soluble barium hydroxide in water, barium sulphate is not hazardous on account of the fact that it is virtually insoluble in water.
www2.gtz.de /uvp/publika/English/vol315.htm   (389 words)

  
 EPA Ground Water & Drinking Water > breadcrumb? > Consumer Factsheet on: BARIUM
Barium is a lustrous, machinable metal which exists in nature only in ores containing mixtures of elements.
Barium is released to water and soil in the discharge and disposal of drilling wastes, from the smelting of copper, and the manufacture of motor vehicle parts and accessories.
Barium does not bind to most soils and may migrate to ground water.
www.epa.gov /safewater/contaminants/dw_contamfs/barium.html   (911 words)

  
 I-X Barium Meal (ca. 1920s)   (Site not responding. Last check: 2007-10-10)
Barium sulfate is used as a contrast agent to improve the visualization of the gastrointestinal tract in an x-ray image.
A major problem with barium sulfate is that is is not soluble in water.
In the 1920s, various formulas were developed to keep the barium in suspension, and one of the first to be marketed was I-X Barium Meal produced by Industrial X-ray Research Laboratories of St. Louis.
www.orau.org /ptp/collection/Radiology/bariumcontrastIX.htm   (244 words)

  
 Barium (Ba) - Chemical properties - Health and Environmental effects
Barium is often used in barium-nickel alloys for spark-plug electrodes an in vacuum tubes as drying and oxygen-removing agent.
Barium is surprisingly abundant in the Earth's crust, being the 14th most abundant element.
Barium compounds that are persistent usually remain in soil surfaces, or in the sediment of water soils.
www.lenntech.com /Periodic-chart-elements/Ba-en.htm   (660 words)

  
 Barium Enema Information on Healthline
The purpose of a barium enema is to demonstrate the anatomy and morphology of the large intestine.
A barium enema may be performed for a variety of reasons, including abdominal pain or a change in bowel habits such as diarrhea or constipation, as well as a change in the caliber (size) of the stools.
Sometimes a barium enema may be used as a treatment for intussusception (telescoping of one section of the bowel into another causing obstruction).
www.healthline.com /galecontent/barium-enema   (1111 words)

  
 Barium
Barium was discovered as an element in 1808 by Sir Humphrey Davy.
The sulphate is used in pigments and glassmaking, and the insoluble non-toxic form is used in radiography.
Barium is also a key element in the production of ceramic superconductors.
www.azom.com /details.asp?ArticleID=575   (280 words)

  
 Chemtrails And 'Death By Barium'
Barium salts which are poisonous are Barium carbonate, barium nitrate, barium chloride, barium hydroxide, barium sulfide, barium chlorate and barium acetate.
Barium sulphide in a cream is sometimes used as a depilatory, i.e.
Barium Carbonate is known as Baryta Carbonica and is one of the major polychrest remedies utilised in homeopathy.
www.rense.com /general32/barium.htm   (4297 words)

  
 Aerosol Operation Crimes & Cover Up
Barium production is stated at 6 million tons per year, strontium at 137,000 tons, cesium at 20 tons and rubidium in such low levels as to not be available.
The sulphate compound that has been formed by both displacement and electrolysis is highly insoluble, and is insoluble in hydrochloric acid.
A sample of the electrolysis compound, identified as barium sulphate, is subjected to a flame test using a nichrome wire.
www.carnicom.com /flame1.htm   (1383 words)

  
 CHEMTRAILS - CONTRAILS
Barium is a highly toxic substance, and the concentration levels that are a hazard are on par with arsenic (1).
Sulphates are produced commonly from incomplete combustion processes, and are one of the most abundant sources of pollution in the atmosphere.
As a matter of fact, it must be highly insoluble in water as barium sulphate is commonly used in gastro-intestinal x-ray examinations.
www.carnicom.com /precip1.htm   (2981 words)

  
 [No title]
Two barium compounds - barium sulfate and barium carbonate - are often found in underground deposits.
Barium is a metallic element, soft, and when pure is silvery white like lead; it belongs to the alkaline earth group, resembling calcium chemically.
Barium releases from electric utilities are too low to cause adverse health effects.
www.lycos.com /info/barium--water.html?page=2   (300 words)

  
 Barium sulphate   (Site not responding. Last check: 2007-10-10)
Barium is released to the chemicals they can undergo are caused by breathing in air purification holding.
Barium sulphate based on this is a wide variety of electronic components, in the environment.
Barium compounds that barium is used as a rat poison, while the nitrate or barium affect children.
barium.bagopps.net /barium-sulphate.html   (327 words)

  
 Barium Meal should be followed by Colonic hydrotherapy.
As you may know, Barium is a soft white metal and Barium Sulphate is used for investigative X-rays of the digestive system.
Barium is insoluble and non-poisonous but it lingers in the system.
Barium stools are white and heavy and can be difficult to flush from the lavatory pan.
www.naturalpractices.co.uk /colonic-hyrotherapy-after-barium-meal.htm   (389 words)

  
 Barium Swallow / Meal / Follow Through - Patient UK
This is similar to a barium swallow (above) but aims to look for problems in the stomach and duodenum such as ulcers, polyps, tumours, etc. You drink some barium liquid, but you then lie on a couch whilst x-ray pictures are taken over your abdomen.
However, instead of drinking the barium liquid, a thin tube is passed down your gullet (oesophagus), through the stomach and into the first part of the small intestine.
Barium x-ray tests are done less commonly these days as the more common test to look into the oesophagus, stomach and duodenum is with a flexible telescope (endoscopy).
www.patient.co.uk /showdoc/27000478   (1193 words)

  
 Introduction to Chemical Reactions
is barium sulphate an ionic compound consisting of one barium +2 ion for every sulphate -2 ion.
Barium hydroxide and sulphuric acid are aqueous solutions, meaning that they have been dissolved in water.
Barium sulphate is a precipitate, meaning it is an insoluble solid formed by combining aqueous solutions.
www.chemprofessor.com /rxn.htm   (1845 words)

  
 The Children's Hospital at Westmead - Parents - Barium enema
A Barium enema examination is a series or X-rays taken to show your child’s large bowel, colon and rectum, by injecting a white liquid called barium into the bowel.
Barium is a white liquid with a milk shake chalky texture containing radiopaque substance (barium sulphate) which makes the large bowel easier to visualise.
As the bowel fills with barium, loops of fl gut will be seen on the television screen, which helps to show the normal bowel contour, patency and position.
www.chw.edu.au /parents/factsheets/barium_enema.htm   (625 words)

  
 The Children's Hospital at Westmead - Parents - Barium swallow, barium meal and follow through
Barium swallow, barium meal and follow through examination is a series of X-rays to show your child’s upper digestive tract (oesophagus, stomach and the small intestine) by swallowing a white liquid called barium.
Barium is a white liquid with a milk shake chalky texture containing a radiopaque substance (barium sulphate) which makes the upper digestive tract visible.
As the barium is swallowed, the flow of the barium will be observed and X-ray pictures will be taken.
www.chw.edu.au /parents/factsheets/barium_swallow.htm   (541 words)

  
 By Product Line   (Site not responding. Last check: 2007-10-10)
Barium Carbonate is manufactured from natural barium sulphate (baryte).
Chemically precipitated Barium Sulphate with main application as filler in paints, coatings, pigments and plastics, and as functional additive in batteries.
Barium Chloride Dihydrate is used in waste water treatement, the production of PVC stabilizers, oil lubricants, barium chromate and barium fluoride.
www.barioderivati.com /products/by_product_line/0,5715,2892-_EN,00.html   (157 words)

  
 BARIUM and COMPOUNDS / Toxicology - Edouard Bastarache
The main insoluble salts are : the arsenate, carbonate, chromate, fluoride, oxalate, sulphate.
-When the blood concentration of barium was measured in the course of acute intoxications, values greater than 100 µg/L were observed.
The TLV-TWA (ACGIH) for soluble barium salts is 0.5 mg/m3.
ceramic-materials.com /cermat/education/162.html   (1280 words)

  
 Solubility of the hydroxides, sulphates and carbonates of the Group 2 elements in water
Figures for magnesium sulphate and calcium sulphate also vary depending on whether the salt is hydrated or not, but nothing like so dramatically.
You may also remember that barium sulphate is formed as a white precipitate during the test for sulphate ions in solution.
The ready formation of a precipitate shows that the barium sulphate must be pretty insoluble.
www.chemguide.co.uk /inorganic/group2/solubility.html   (730 words)

  
 The Chemical Engineers' Resource Page   (Site not responding. Last check: 2007-10-10)
We mainly deal in exportations of organic and inorganic chemical materials, pharmaceutical raw materials, food additive agents, biological preparations, dyestuff and intermediates, pigments and assistants, fertilizers etc. 1.Zinc Sulphate Heptahydrate (Powder and Granular) Properties: White crystal, easy soluble in water, insoluble in ethanol.
Barium Carbonate (Powder and Granular) Formula: BaCO3 Molecular weight: 197.35 Property: It has three crystal state, monoclinic, hexagon and cubic.
Forming barium sulfate when combining with sulphuric acid.
www.cheresources.com /forums/forum1/thread_full23.shtml   (4313 words)

  
 Barium Hydroxide, Barium Hydroxide Manufacturers Suppliers Exporters of Barium Hydroxide
Exporters of barium carbonate, barium chloride, barium hydroxide, barium sulphate, barium nitrate, sodium nitrate, strontium carbonate, sodium nitrate, potassium nitrate, mercury, mercuric chloride and sodium nitrite.
Producers of magnesium sulphate, zinc sulphate, dried ferrous sulphate, sodium thio sulphate, sodium selentite, sodium tungstate, sodium lauryl sulphate, sodium cumene sulphonate, sodium molybdate, ammonium molybdate, phosphoric acid and barium hydroxide.
Manufacturer of athenolol, barium carbonate, barium hydroxide, barium sulphate, rubber chemicals, rubber, tin oxide, titanium dioxide, magnesium oxide, magnesium carbonate, synthetic red oxide, synthetic yellow oxide, zincoxide.
www.indianchemicalportal.com /barium-hydroxide.html   (449 words)

  
 Determination of barium as sulphate   (Site not responding. Last check: 2007-10-10)
The barium sulphate may be precipitated either by the use of sulphuric acid or from homogeneous solution by the use of sulphamic acid solution which produces sulphate ions on boiling:
The solution (100mL) should  contain not more than 0.15 g of barium and not more than 1 percent by volume of concentrated hydrochloric acid.
A solution prepared from about 0.18 g of accurately weighed barium chloride may be used to obtain experience in the determination.
www.cpachem.com /en/Clas/Ba-grav.htm   (269 words)

  
 DEATH BY BARIUM: "POISON SLEUTHS" ARTICLE IN SCIENCE REPORTER
So you can see, barium salts were in rampant use in ancient times.
"Tarun, I must tell you that till now barium has not been used much by the poisoner to kill people, although it has several properties of an ideal homicidal poison (for ideal homicidal poisons, see "Arsenic- the King of Poisons", Science Reporter February 1997).
Barium has been used for suicide, but this poisoning has mostly remained accidental till now.
members.tripod.com /~Prof_Anil_Aggrawal/POISO016.HTML   (3159 words)

  
 Barium Chloride, Barium Chloride Manufacturers Suppliers Exporters of Barium Chloride
Manufacturers and exporters of industrial chemicals that includes aluminum stearate, aluminum sulphate, ammonia alum, ammonium chloride, ammonium per sulphate, ammonium sulphate, butylated hydroxytoluene, barium carbonate, barium sulphate.
Supplying industrial chemicals such as potassium chloride, toluene, calcium fluoride, di ammonium phosphate, phosphate chemicals, calcium chloride, zinc sulphate, barium sulphate, borate chemicals, magmesium carbonate and hydrochloric acid.
Manufacturers and stockists of specialty chemicals such as sodium molybdate, ammonium molybdate, barium hydroxide, barium chloride, sodium bromide, sodium tungstate, potassium bi carbonate, sodium lauryl sulphate and sodium cumene sulphonate.
www.indianchemicalportal.com /barium-chloride.html   (891 words)

  
 Bariums, Barium Sellers, Suppliers, Manufacturers, Exporters, Factories
Hebei Xinji Chemical Group Co., Ltd. is the largest manufacturer and exporter of Barium and Strontium Salts in Asia, annual output and export is separately 200000 tons and 100000 tons.
Annual output of barium carbonate is separately 20000 tons.
Barium nitrate Molecular formula: Ba(NO3)2 Molecular weight: 261.35 Properties: Barium nitrate is colorless or white transparent crystal and powder, easily dissolve in water.
www.fuzing.com /manufacturers/barium   (890 words)

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