Assertion: carbon black | /r/CapableOf | recommend carbon blacks
Facets:
value: with polycyclic aromatic hydrocarbon contamination levels
type: OTHER
Source sentences:
text: The National Institute for Occupational Safety and Health (NIOSH) criteria document (1978)on carbon black recommends only carbon blacks with polycyclic aromatic hydrocarbon contamination levels greater than 0.1% (1,000 parts per million) be considered suspect carcinogens; and