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Message: <blockquote data-quote="topkollek" data-source="post: 29741423" data-attributes="member: 510150"><h4>How likely are naphthalene, 1 methylnaphthalene, or 2 methylnaphthalene to cause cancer?</h4>   There is no direct evidence in humans        that naphthalene, 1-methylnaphthalene, or 2-methylnaphthalene        cause cancer. However, cancer from naphthalene exposure has        been seen in animal studies. Some female mice that breathed        naphthalene vapors daily for a lifetime developed lung tumors.        Some male and female rats exposed to naphthalene in a similar        manner also developed nose tumors.   Based on the results from animal studies, the Department of        Health and Humans Services (DHHS) concluded that naphthalene        is reasonably anticipated to be a human carcinogen. The International        Agency for Research on Cancer (IARC) concluded that naphthalene        is possibly carcinogenic to humans. The EPA determined that        naphthalene is a possible human carcinogen (Group C) and that        the data are inadequate to assess the human carcinogenic potential        of 2-methylnaphthalene.<a href="https://wwwn.cdc.gov/TSP/ToxFAQs/ToxFAQsDetails.aspx?faqid=239&toxid=43" target="_blank">https://wwwn.cdc.gov/TSP/ToxFAQs/ToxFAQsDetails.aspx?faqid=239&toxid=43</a></blockquote>

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