IARC classifies formaldehyde as a human carcinogen, and in 2011 the U.S. National Toxicology Program (NTP) named formaldehyde a known human carcinogen in its 12th Report on Carcinogens; exposure is linked to nasopharyngeal cancer and myeloid leukemia.
Formaldehyde is classified by IARC as a human carcinogen and by the U.S. National Toxicology Program (2011) as a "known human carcinogen," linked to nasopharyngeal cancer and myeloid leukemia. Its direct use as a food additive/preservative is tightly restricted and banned in many countries.