A HUMAN CARCINOGEN: Formaldehyde — a colourless, highly toxic and  flammable gas at room temperature — is a toxic substance widely used in  many industries. According to the National Institute of Occupational  Safety and Health in Washington, D.C, formaldehyde is used in glues and  resins, dyes, textiles, disinfectants, building materials, automobile  parts, embalming and laboratories. 
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