Furan

Furan is a volatile compound that forms primarily during the thermal processing of foods[1]. It is a colorless, volatile, and somewhat toxic liquid that boils at 31.36° C (88.45° F)[2]. Furan is considered possibly carcinogenic to humans based on high-dose animal tests[3].

Formation and Detection in Foods

Furan is formed during the thermal processing of foods, particularly in those that undergo heat treatment, such as canned and jarred foods[3]. It has been detected in various food products, including infant formula, bread, coffee, fruit juice, dairy products, nutritional drinks, canned jam, flavorings, vinegars, beers, and soy sauce[1]. The levels of furan in these products vary widely, ranging from not detectable in some infant formulas to high levels in coffee and soy sauce[1].

Toxicity and Health Risks

Furan is considered a hazardous substance due to its potential to cause cancer and other health problems[4]. It can affect humans when inhaled and may be absorbed through the skin[4]. Contact with furan can irritate and burn the skin and eyes, and inhaling it can irritate the nose and throat[4]. Higher exposures may cause a build-up of fluid in the lungs (pulmonary edema), which is a medical emergency[4].

Regulation and Assessment

The US Environmental Protection Agency (EPA) has not assessed furan under its Integrated Risk Information System (IRIS) program, which provides quantitative risk information on the health effects of environmental contaminants[5]. However, the EPA has established a reference dose (RfD) for oral exposure to furan, which is the daily oral exposure to the human population that is likely to be without an appreciable risk of deleterious effects during a lifetime[5]. The RfD for furan is 1 x 10-3 mg/kg-day, based on hepatic lesions observed in animal studies[5].

Conclusion

Furan is a volatile compound that forms during the thermal processing of foods and is considered possibly carcinogenic to humans. It has been detected in various food products, and its levels vary widely. Furan is a hazardous substance that can cause skin and eye irritation, respiratory problems, and pulmonary edema. While the EPA has not assessed furan under its IRIS program, it has established a reference dose for oral exposure to furan based on animal studies.

Citations:

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4609971/

[2] https://www.britannica.com/science/furan

[3] https://www.fda.gov/food/process-contaminants-food/exploratory-data-furan-food

[4] https://nj.gov/health/eoh/rtkweb/documents/fs/0952.pdf

[5] https://iris.epa.gov/ChemicalLanding/%26substance_nmbr=56