a preparation of barium sulphate, which is opaque to X-rays, swallowed by a patient before X-ray examination of the upper part of the alimentary canal
baryta (def 1). Also called calcined baryta, barium oxide, barium monoxide, barium protoxide. a white or yellowish-white poisonous solid, BaO, highly reactive with water: used chiefly as a dehydrating agent and in the manufacture of glass. Also called caustic baryta, barium hydroxide, barium hydrate. the hydroxide, hydrated form of this compound, Ba(OH) 2 ⋅8H 2 […]
- Barium oxide
baryta (def 1). Historical Examples barium oxide is not often used and soda cannot be used in raw glazes because there is no convenient substance which contains it. The Potter’s Craft Charles F. Binns By digesting caustic baryta, or barium oxide, with a little water, or igniting gently the crystallised hydrate. Cooley’s Cyclopdia of Practical […]
- Barium stearate
a white, crystalline, water-insoluble solid, Ba(C 18 H 35 O 2) 2 , used chiefly as a waterproofing agent and as a lubricant.
- Barium sulfate
a white, crystalline, water-insoluble powder, BaSO 4 , used chiefly in the synthesis of pigments, as in paints and printing inks, and, because of its radiopacity, for x-ray diagnosis in medicine. Historical Examples If sulfurous acid is present, it will be oxidized to sulfuric acid and precipitated as barium sulfate by the barium chlorid. Detection […]