Assertion: tartaric acid | /r/CapableOf | know as its acid potassium salt
Facets:
value: from antiquity
type: TEMPORAL
Source sentences:
text: Tartaric Acid known from antiquity as its acid potassium salt (a sparingly soluble compound which formed a deposit in wine vats) was discovered in 1769 by the Swedish chemist SCHEELE who managed to extract it by its calcium salt with sulphuric acid.