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Nominated Substances: Tungsten, Tungsten oxide (W10 O29), Tungsten oxide (W18 O49), Tungsten Suboxide Fibers, Tungsten trioxide
Nomination Date: 05/19/2003
Nominator: NCI
Rationale: Important industrial raw materials; one of several metals that may form toxic fibrous "whiskers"; carcinogenic potential of tungsten (vs. cemented tungsten carbide) is not adequately characterized