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Nomination Summary for Lanthanides (N20417)

Nominated Substances: Ceric oxide

Nomination Date: 09/08/2004

Nominator: NIEHS

Rationale: Widespread industrial use and potential for increasing exposure; demonstrated pulmonary toxicity; lack of toxicity data for nanoscale form.

NTP Principles: 1, 6, 7

Status: Deferred

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