What is Triclosan ?
Triclosan is an antibacterial and bacteriocidal agent used in a wide array of consumer goods, such as cleaning products, cosmetic products, furniture, and textiles, to prevent the growth of bacteria, mold, and mildew.
Triclosan is used as an ingredient in basically everything at this time : antibacterial hand soaps, dishwashing liquids, laundry soaps, fabric softeners, disinfectants, deodorants, mop heads, brooms, vacuums, sponges, trash bags, kitchen wipes, dishpans, dish racks, and sink mats. It's also used in textiles, so it may very well be found in kitchen dish towels and cleaning cloths that have built-in antibacterial protection.
This chemical belongs nowhere in a product that is supposed to be "green" due to questions regarding its safety and potentially devastating effects upon aquatic systems. So if you see products that claim to be eco-friendly and antibacterial, take a good hard look at the label. If the antibacterial claims in cleaning products aren't based on natural ingredients like essential oils, for example, suspect Triclosan.
Triclosan is regulated by the Environmental Protection Agency (EPA) when its use is considered a pesticide and by the FDA for other purposes. In light of new research and data, the EPA is scheduling another review of Triclosan in 2013. The FDA also states in its consumer update article, "Triclosan: What Consumers Should Know," that it is collaborating with the EPA and reviewing Triclosan's safety, too.
Health & Environment
This use of this prevalent chemical has been greatly questioned and researched due to health concerns. It has been found to be present in the urine of almost 75% of over 2,500 urine samples collected as part of the 2003–2004 National Health and Nutrition Examination Survey (NHANES) according to a 2007 study. There are concerns that its widespread use may contribute to antibiotic resistance as noted in a 2010 article published in The Journal of the American Medical Association.
It has also been found to increase allergic sensitization to food and airborne allergens as shown in a 2012 study published in the Journal of Allergy and Clinical Immunology. To top it off, the EPA notes in its article "Triclosan Facts" that since its 2008 assessment of Triclosan new data has warranted more research due to thyroid and estrogen effects.
Triclosan, which is toxic to fish and other aquatic animals, is suspected to potentially bioaccumulate in aquatic environments according to the EPA. This definitely seems to be the case as a 2002 study published in Environmental Science and Technology states Triclosan was in the top seven of contaminants found in water samples taken from a total of 139 streams across 30 states by the U.S. Geological Survey.
Also, a 2011 study published in Chemosphere notes that Triclosan can react with chlorine in wastewater treatment plants to form chlorinated triclosan derivatives (CTDs) which when dumped into natural waters and exposed to sunlight can form dioxins, toxic chemical compounds that cause major health issues, such as cancer.
Studies have shown that washing with plain soap is just as effective as antibacterial soaps containing Triclosan in removing bacteria, so there really is no need to have this chemical in hand soaps or hand sanitisers, for that matter. Other eco-friendly ingredients such as essential oils, have natural antibacterial, antifungal, and antiviral properties and can easily take the place of Triclosan in cleaning products.