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Six Classes of Chemicals

Views:30     Author:Site Editor     Publish Time: 2020-05-28      Origin:HARVARD T.H CHEAN SCHOOL OF PUBLUC HEALTH

Six Classes of Chemicals



Among the hundreds of thousands of chemicals existing in our daily lives, these six classes are of particular concern with regard to the health of both the environment and ourselves


 Highly Fluorinated Chemicals: Highly fluorinated chemicals are used in cookware, clothing,   outdoor apparel, carpeting, and food packaging to provide oil- and water-resistant   properties. They are persistent in the environment and have been detected in humans and   biota all over the globe. In humans, some highly fluorinated chemicals have been associated   with kidney and testicular cancer, thyroid disruption, elevated total cholesterol, and obesity.




 Antimicrobials:Antimicrobials such as triclosan and triclocarban, are used in products from soap,   deodorant, and toothpaste to socks, lunchboxes, and counter tops to prevent microbial growth.   Antimicrobials can be ingested or absorbed through the skin and are detected in most Americans.   They are a concern because they are associated with adverse endocrine, thyroid, and reproductive   changes and their use can lead to resistant strains of bacteria. Soap and water can be a better   alternative.



 Flame Retardants: Flame retardants are used in furniture and baby product foam, building   insulation, electronics, and other products to reduce fire hazard. They are detected in most   Americans, with the highest levels in children, and they have been associated with endocrine   disruption and reproductive, neurologic, and immune impairment as well as cancer. As   currently used in furniture, building insulation and some other products, flame retardants do   not increase fire safety.

         

       

 Bisphenols & Phthalates: Bisphenols and phthalates act as endocrine disruptors, interfering   with the hormone signaling mechanisms of the human body. They are found in plastics,   pesticides, flame retardants, and other products and are measured in all humans. They can   cause disruption to reproductive, metabolic, neurologic, and immune systems and the   thyroid at very low concentrations and are most harmful during critical windows of   development of the fetus.



 Organic Solvents: Organic solvents are used in paint, coatings, degreasers, dry cleaning   chemicals, and many other products in order to dissolve other chemical constituents. Many   non-water    based organic solvents release vapors that humans inhale and absorb. Some   organic solvents are associated with neurotoxicity, reproductive toxicity, and carcinogenic   effects during short-term high level exposure and over prolonged periods of low level   exposure.



 Certain Metals: Certain metals like lead, cadmium, beryllium, and mercury, have been   harming human health for millennia. Metal toxicity can result in reduced mental and central   nervous function, lower energy levels, and damage to blood, lungs, kidneys, liver, and other   organs. Some metals like zinc that provide a health benefit in small doses can be toxic at   high levels.


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