Assertion: sodium fluoride | /r/ObjectUse | used as insecticide
Facets:
value: a century ago
type: TEMPORAL
Source sentences:
text: It is used as an insecticide.
text: Well over a century ago, sodium fluoride was used as an insecticide and also as a rat poison.
text: It is also used as a wood preservative, corrosion inhibitor, cleaning agent, insecticide, chemical reagent, and in metallurgy and glass industries.