Assertion: corrosion metal impurity | /r/HasProperty | less than 500 wppb
Facets:
Source sentences:
text: Outflow stream 121 from resin bed 107 preferably comprises unreacted acetic acid and a concentration of corrosion metal impurities that is less than 500 wppb, e.g., less than 100 wppb or less than 50 wppb.