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Nomination Summary for Silica flour: fine & ultrafine crystalline silica particulate (N20601)

Nominated Substances: Amorphous silica, Silica, crystalline - quartz

Nomination Date: 10/14/2005

Nominator: Private Individual

Rationale: Use in skin care and pharmaceutical products; inhalation exposures associated with autoimmune disease; lack of toxicity data for oral and dermal exposures.

NTP Principles: not specified

Agents and Status

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

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CASRN: 14808-60-7

Agent Name: Silica, crystalline - quartz