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Table 1 Categorization of flame retardants based on in vivo toxicological data (availability and toxicological concern)

From: Prioritization of hazards of novel flame retardants using the mechanistic toxicology information from ToxCast and Adverse Outcome Pathways

  1. Prioritization categories
  2. Cat I: substantial toxicological data indicating toxicological concern
  3. Cat II: scarce toxicological data indicating toxicological concern
  4. Cat III: substantial toxicological data indicating lower toxicological concern
  5. Cat IV: scarce toxicological data indicating lower toxicological concern
  6. Cat V: insufficient toxicological data to evaluate the toxicological concern
  7. * High toxicological concern
  8. ** All vertebrates/mammals