Plastic bottles were uncommon until the late 1940’s. They remained expensive until the invention of high density polyethylene in the 1960’s. Popularity then zoomed among both the manufacturers and consumers because plastics were light in weight and cheaper to make.
The controversy about plastic safety is eternal, not only because of health issues, but also because of environmental concerns. Here’s what we need to know. Note that it’s not a good idea to refill any plastic bottle, especially with chlorine-laden tap water.
That PET has the term terephthalate is misleading. Terephthalate is not the same thing as phthalate. The former comes from terephthalic acid, chemical formula C6H4(COOH)2. The latter comes from phthalic acid, formula C6H4(CO2H)2. The chemical difference is easily seen.
The American Chemistry Council asserts that phthalates are not used to make beverage bottles or any other type of plastic food-contact product. Phthalates, or rather orthophthalates, are used to make PVC flexible, as found in shower curtains and vinyl flooring. (Enneking, 2006)
A concern about PET is the leaching of antimony, a catalyst in PET manufacture, into the contents of the bottle. Any residue can be removed by washing. Some remains in the material, being released if heated.
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Bach C, Dauchy X, Chagnon MC, Etienne S. Chemical compounds and toxicological assessments of drinking water stored in polyethylene terephthalate (PET) bottles: A source of controversy reviewed. Water Res. 2012 Mar 1;46(3):571-83.
David Biello Plastic (Not) Fantastic: Food Containers Leach a Potentially Harmful Chemical Is bisphenol A, a major ingredient in many plastics, healthy for children and other living things? Scientific American; February 19, 2008 http://www.scientificamerican.com/article.cfm?id=plastic-not-fantastic-with-bisphenol-a
Eilam-Stock T, Serrano P, Frankfurt M, Luine V. Bisphenol-A impairs memory and reduces dendritic spine density in adult male rats. Behav Neurosci. 2011 Oct 17.
Patricia A. Enneking Phthalates Not in Plastic Food Packaging Environ Health Perspect. 2006 February; 114(2): A89–A90.
Hansen C, Tsirigotaki A, Bak SA, Pergantis SA, Stürup S, Gammelgaard B, Hansen HR. Elevated antimony concentrations in commercial juices. J Environ Monit. 2010 Apr;12(4):822-4.
Kate Kelland Scientists link plastics chemical to health risks Exposure to a chemical found in plastic containers is linked to heart disease, scientists said on Wednesday, confirming earlier findings and adding to pressure to ban its use in bottles and food packaging. (Reuters) - Wed Jan 13, 2010 http://www.reuters.com/article/2010/01/13/us-heart-chemical-plastics-s-idUSTRE60C0AR20100113
Kolšek K, Mavri J, Sollner Dolenc M. Reactivity of bisphenol A-3,4-quinone with DNA. A quantum chemical study. Toxicol In Vitro. 2012 Feb;26(1):102-6. Epub 2011 Nov 20.
SAKAMOTO HIROMI, MATSUZAKA AYAKO, ITO RIMIKO, TOYAMA YUKO Quantitative Analysis of Styrene Dimer and Trimers Migrated from Disposable Lunch Boxes. Journal of the Food Hygienic Society of Japan. VOL.41;NO.3;PAGE.200-205(2000)
Schmid P, Kohler M, Meierhofer R, Luzi S, Wegelin M. Does the reuse of PET bottles during solar water disinfection pose a health risk due to the migration of plasticisers and other chemicals into the water? Water Res. 2008 Dec;42(20):5054-60.
Shotyk W, Krachler M, Chen B. Contamination of Canadian and European bottled waters with antimony from PET containers. J Environ Monit. 2006 Feb;8(2):288-92.
Vasami R Polyethylene Terephthalate and Endocrine Disruptors. Environ Health Perspect. 2010; 118:A196-A197.
*These statements have not been evaluated by the FDA. These products are not intended to treat, diagnose, cure, or prevent any disease.