In 1987, the U.S. Environmental Protection Agency (EPA) classified formaldehyde as a probable human carcinogen. In 2011, the Department of Health and Human Services (HHS) determined that formaldehyde is a known human carcinogen based on human and animal inhalation studies. The International Agency for Research on Cancer (IARC) has also classified formaldehyde as a human carcinogen., , , , Formaldehyde is a volatile organic compound (VOC), and as a gas, is colorless with a strong odor. It ha...