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Nomination Summary for Tungsten trioxide & suboxides (N20343)

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

NTP Principles: 1, 3, 7

Agents and Status

The following information relates to the specific agent and may include history from earlier or later nominations for this same agent.

CASRN: 1314-35-8

Agent Name: Tungsten trioxide