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Nominated Substances: Potassium ferricyanide
Nomination Date: 10/25/1999
Nominator: NCI
Rationale: There is the potential for widespread exposure of workers and consumers to potassium ferricyanide from its use in photographic darkrooms. There is very little toxicity information available, but there is a suspicion of toxicity based on its redox potential, not on the presence of the cyanide moiety.