Assertion: crude phosphoric acid | /r/HasProperty | obtained by the acidulation of therock
Facets:
value: with sulphuric acid
type: OTHER
Source sentences:
text: Where phosphoric acid of a purity suitable for food purposes is to be derived from phosphate rock the crude phosphoric acid obtained by the acidulation of therock with sulphuric acid contains a number of impurities which must be removed or greatly reduced in volume.