Nomenclature
CAS number: 7727-43-7
Blanc fixe; Baritop (Sakai); Barosperse (Mallinckrodt); Esophotrast (RPR); E-Z-Paque (E-Z-Em); Intestibar (Spofa); Micropaque (Guerbet); Microtrast (Guerbet); Mixobar (Byk Gulden); Neobar (Merck KGaA); Oratrast (RPR); Prontobario (Bracco); Radiopaque (Schering AG); Telebar (Guerbet); Tixobar (Astra).
BaO
4S; mol wt 233.39.
Ba 58.84%, O 27.42%, S 13.74%.
BaSO
4.
Description and references
Occurs in nature as the mineral barite; also as barytes, heavy spar. Prepn: Gmelins, Barium (8th ed) 30, 262-267 (1932) and supplement, 182-186,
412-414 (1960). Review of clinical use: R. F. Theoni, A. R. Margulis, Radiology 167, 7 (1988).
Properties
Fine, heavy, odorless powder or polymorphous crystals, d 4.25-4.5. Dec above
1600°. Practically insol in water (one gram dissolves in 400,000
parts), dil acids, alc. Sol in hot concd H2SO4.Caution
Potential symptoms of overexposure
by direct contact are irritation of eyes, nose and upper respiratory
system; inhalation may cause benign pneumoconiosis. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 24.Use
Manuf photographic papers, artificial ivory, cello-phane;
filler for rubber, linoleum, oil cloth, polymeric fibers and resins,
paper, lithographic inks; as a water-color pigment for colored paper,
in wallpaper; as a size for modifying the colors of other pigments;
in heavy concrete for radiation shield.
Therapeutic Category
Diagnostic aid (radiopaque medium).
Therapeutic Category (Veterinary)
X-ray contrast medium.
Keywords
Diagnostic Aid (Radiopaque Medium)