Assertion: dropping funnel | /r/HasProperty | useful
Facets:
value: for adding reagents
type: PURPOSE
Source sentences:
text: Dropping funnels are useful for adding reagents slowly, i.e. drop-wise.
text: These replace the liquid volume lost in the bulb with the equivalent gas volume from the flask into which the reagent is flowing, and are useful when handling air-sensitive reagents in a sealed, inert-gas environment.