Assertion: barium sulfate | /r/ObjectUse | used as insoluble additive
Facets:
value: in a purer form
type: OTHER
value: to oil well drilling fluid
type: TRANSITIVE-OBJECT
Source sentences:
text: Barium sulfate is used as an insoluble additive to oil well drilling fluid, as well as in a purer form, as X-ray radiocontrast agents for imaging the human gastrointestinal tract.