Assertion: sodium carbonate | /r/ObjectUse | used since antiquity
Facets:
value: for cleaning
type: PURPOSE
value: for preservation
type: PURPOSE
value: for the manufacture of glass
type: PURPOSE
Source sentences:
text: Sodium carbonate ("soda" or "natron") and potassium carbonate ("potash") have been used since antiquity for cleaning and preservation, as well as for the manufacture of glass.