Assertion: anionic surfactant | /r/MadeOf | anionic functional groups
Facets:
value: at their head
type: LOCATION
Source sentences:
text: Anionic surfactants contain anionic functional groups at their head, such as sulfate, sulfonate, phosphate, and carboxylates.
text: Anionic surfactants contain anionic functional groups at their head, such as sulfate, sulfonate, phosphate, and carboxylates.