Assertion: crystalline pyrophosphoric acid | /r/ObjectUse | used in turn
Facets:
Source sentences:
text: Various attempts have also been made heretofore to prepare crystalline pyrophosphoric acid, which might in turn be used in the manufacture of relatively pure pyrophosphates, but such attempts have been generally unsuccessful, because first of all, it took at least several days or weeks to prepare the crystalline material, and secondly, the resulting product was extremely hydroatent scopic, very sticky and lumpy, and therefore difiicult to handle.