How likely is tungsten to cause cancer?
There is not enough information to determine whether inhalation, oral, or dermal exposure to tungsten or tungsten compounds can cause cancer in humans. Tungsten has not been classified for carcinogenic effects by the Department of Health and Human Services (DHHS), the International Agency for Research on Cancer (IARC), or the EPA. Tungsten has been recommended to the National Toxicology Program (NTP) for testing in laboratory animals, which includes a cancer assessment.