Assertion: phosphoric acid | /r/ObjectUse | used in dentistry
Facets:
value: usually
type: TEMPORAL
value: as an etching solution
type: PURPOSE
Source sentences:
text: Phosphoric acid is used in dentistry as an etching solution.
text: Phosphoric acid, recycled from the separation section, containing from about 20% to about 40% P 2 O 5 (and usually some sulfuric acid) is usually used in the process.