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Talc is widely used for industrial and cosmetic purposes. As with every natural product, talc may have mineral contaminants. Tremolite is one of those contaminants. Tremolite may exist in two configurations: asbestiform (origin is a geological growth), and nonasbestiform (particles produced by mechanical forces). Asbestiform fibers are highly toxic and carcinogenic. On the contrary, nonasbestiform elongated particles resemble nuisance dust. Which type of tremolite can be found in ore bodies? Can cosmetic talc contain dangerous tremolite fibers? What does risk assessment methodology tell us about tremolite and talc? What is the most recent update on the IARC statement on talc carcinogenicity? The session will address: 1) questions relevant to risk assessment and public health protection; 2) methodology for distinguishing between asbestiform fibers and nonasbestiform fragments; and 3) a hypothetical case study on the application of cosmetic talc for adults and children.
Upon completion, the participant will be able to:
• Evaluate the geological origin of talc and tremolite in talc.
• Distinguish between asbestiform and non-asbestiform tremolite.
• Perform quantitative risk assessment for tremolite in talc.
• Discuss IARC position on the carcinogenicity of talc.
The session will take place on Monday, May 19th and qualifies for one hour of continuing education CM credit. Additional details and registration are available through the AIHA Connect 2025 website.
C&IH provides national and international consulting from our office located near Denver, Colorado.