Wollastonite toxicity: an update.

Area of Science:

• Mineralogy and Toxicology
• Occupational Health and Epidemiology

Background:

• Wollastonite toxicology and epidemiology have been previously reviewed.
• Limited chronic animal and human mortality data exist, with earlier studies showing mixed results regarding morbidity.
• Wollastonite exhibits low biopersistence, suggesting a basis for its relatively low toxicity.

Purpose of the Study:

• To update the understanding of wollastonite's epidemiology and toxicity.
• To evaluate recent health surveillance data from a wollastonite mining and processing facility.

Main Methods:

• Review of existing literature on wollastonite's chronic toxicity and epidemiology.
• Analysis of health surveillance data from an ongoing occupational health program.
• In vivo and in vitro studies assessing wollastonite biopersistence.

Main Results:

• No new chronic animal bioassay or human mortality studies have been published.
• Wollastonite demonstrates low biopersistence in both in vivo and in vitro models.
• Recent analysis of occupational exposure data indicates no pleural plaques, interstitial lung disease, or lung function decrements in workers, including never and former smokers.

Conclusions:

• Wollastonite possesses relatively low toxicity.
• Effective exposure reduction and product stewardship programs are crucial for managing potential risks.
• Current management practices at facilities like the New York site suggest wollastonite can be handled with minimal adverse health outcomes.