perchlorate health effects



In addition to the detrimental effects this toxin can have on thyroid health, in his book Dr. Brownstein also discussed … One place where perchlorate occurs naturally is in saltpeter deposits in Chile, where the saltpeter is used to make fertilizer. The perchlorate anion is biologically significant specifically with respect to the functioning of the thyroid gland. Perchlorate acts pharmacologically as a competitive inhibitor of thyroidal iodide uptake in mammals, but the impacts of perchlorate contamination in aquatic ecosystems and, in particular, the effects on fish are unclear. Biological and chemical processes are also effective in removing this species from water. Int. Human Health. Perchlorate exposure at certain levels can disrupt the function of the thyroid gland by interfering with the iodide uptake and thyroid hormone production. This review aimed to evaluate whether environmental levels of perchlorate are sufficient to cause the most sensitive adverse health effects. Iodine, an essential nutrient, is necessary for the synthesis of the thyroid hormones, triiodothyronine (T3) and thyroxine (T4). The updated PHG is lower because it incorporates new research about the effects of perchlorate on infants. 2. Identified associations between increasing urinary perchlorate and decreasing thyroxine, decreasing free thyroxine, and increasing thyroid stimulating hormone. J. Environ. Here’s what you need to know about the health effects of perchlorate: What is perchlorate? Because some controversy surrounds the environmental and health effects of perchlorate, the National Research Council (NRC) was asked to assess potential adverse health effects of perchlorate ingestion. What other studies might be needed? Possible Effects of Perchlorate Contamination of Drinking Water on Thyroid Health Sunny P Orathel , 1 Ronnie Thomas , 2 N. Chandramohanakumar , 3 Joy Job Kulavelil , 4 Krishnapillai Girish Kumar , 5 Vadayath Usha Menon , 6 P. Jayaprakash , 7 Sajitha Krishnan , 8 P.S. Chlorates are nephrotoxic; acute renal failure may occur. Health Effects Assessment for Environmental Perchlorate Contamination: The Dose Response for Inhibition of Thyroidal Radioiodine Uptake in Humans Monte A. Greer,1 Gay Goodman,2 Richard C. Pleus,2 and Susan E. Greer1 1Oregon Health & Science University, Portland, Oregon, USA; 2Intertox, Inc., Seattle, Washington, USA The ammonium salt of the perchlorate ion is manufactured primarily for use … Health Canada. perchlorate potent competitive inhibitor of thyroid sodium-iodide symporter. To determine the health effects of perchlorate in humans, fairly extensive animal toxicity studies have been conducted. The Agency found that perchlorate may have an adverse effect on the health of persons and is known to occur in public drinking water systems with a frequency and at levels that present a public health concern. Environmental Health Perspectives is an Open Access journal published by the National Institute of Environmental Health Sciences. Hypothyroidism may occur following chronic exposures. The potential toxicity of perchlorate in humans is currently under widespread debate. In the first and second editions, these constituted Volume 2 of the GDWQ. Using data from the 2007-2008 National Health and Nutrition Examination Survey, subjects were categorized into exposure groups based on their urinary perchlorate, iodine, and thiocyanate concentrations, and mean serum thyroxine concentrations were compared between groups. Perchlorate in the environment is a health concern because it can disrupt the thyroid’s ability to produce hormones needed for normal growth and development. Known Health Effects Rocket Fuel in Drinking Water: New Studies Show Harm From Much Lower Doses. Perchlorate exposure occurs from ingestion of natural or man-made perchlorate in food or water. 2015. doi: 10.1289/ehp.1409614. Faculty of Engineering, University of Regina, Regina, SK, S4S 0A2, Canada. Perchlorate is a known environmental contaminant, largely due to widespread military use as a propellant. 0.2.1 SUMMARY OF EXPOSURE. It is also noted that perchlorate can cross the placenta of guinea pigs, and may possibly produce goiter in the fetus. Perchlorate is an environmental contaminant that blocks iodine/iodide uptake into the thyroid gland (1). Potassium Perchlorate CAS RN: 7778-74-7 Health Effects. A) Very little information is available on the toxicity of ammonium perchlorate. [PMC free article] Greer MA, Goodman G, Pleus RC, Greer SE. Environ Health Perspect. The California Office of Environmental Health Hazard Assessment (OEHHA) published an updated public health goal (PHG) of 1 part per billion (ppb) for perchlorate in drinking water in February 2015. In “Health Effects Assessment for Environmental Perchlorate Contamination,” by Greer et al. Perchlorate Human Health Effects Materials. Health Effects. Ginsberg G, Rice D. 2005 The NAS perchlorate review: questions remain about the perchlorate RfD Environ Health Perspect 113 1117–1119.111910.1289/ehp.8254. by Asha Srinivasan 1 and Thiruvenkatachari Viraraghavan 2,* 1. Professor Emeritus, Faculty of Engineering, University of Regina, Regina, SK, S4S 0A2, Canada * Author to whom correspondence should be addressed. The study also did not assess potential health effects of exposure. In a 2004 report, the NRC confirmed that perchlorate blocks iodide uptake by the thyroid. This updates the previous California PHG of 6 ppb perchlorate, which was set in 2004. 1. Perchlorate Health Effects. I first learned about perchlorate a number of years ago when reading Dr. David Brownstein's well known book "Iodine, Why You Need It, Why You Can't Live Without It". Yes, perchlorate may have adverse health effects above certain exposure levels. A short overview of the human health effects issues related to exposure to perchlorate will also be presented. thus, has been used treat hyperthyroidism since 1950s. Joe Thomas , 2 Ponnu Jose 2 health effects thyroid inhibition. In 2011, EPA determined that perchlorate meets the Safe Drinking Water Act criteria for regulation as a contaminant. The following chronic (long-term) health effects can occur at some time after exposure to Potassium Perchlorate and can last for months or years: Cancer Hazard * According to the information presently available to the New Jersey Department of Health and Senior Services, Potassium Perchlorate has not been tested for its ability to cause cancer in animals. For example, too much vitamin C, or even too much oxygen, can be “toxic” at high doses, but the mere presence of these compounds doesn’t mean they pose a health risk. 1) Chlorates are principally toxic by ingestion and inhalation. Side effects of perchlorate are classified into three groups: Minor, including incidences of drug rashes, drug fever, lymphadenopathy, and nausea; Agranulocytosis with severe cases of nephrotic syndrome; and aplastic anemia (low incidence). Perchlorate: Health Effects and Technologies for Its Removal from Water Resources . This agent is an irritant of eyes, skin, and mucous membranes. Perchlorate Behavior in a Municipal Lake Following Fireworks Displays [185 KB] Perchlorate salts of potassium and ammonium are the primary oxidants in pyrotechnic mixtures, yet insufficient information is available regarding the relationship between fireworks displays and the environmental occurrence of perchlorate. and presenting critical reviews and evaluations of the effects on human health of the substances or contaminants of potential health concern in drinking-water. EPA then worked with the FDA to develop a dose-response model to analyze the effects of perchlorate on thyroid hormone production. For all of these reasons, this study does not change CDC’s existing recommendations for infant feeding. They are very potent oxidizing agents; exposure may result in hemolysis with methemoglobin formation and secondary DIC. A) WITH POISONING/EXPOSURE . The endpoint most significant to public health is an adverse impact on the developing fetal brain. Since publication of the third edition, they comprise a series of free-standing monographs, including this one. Perchlorate is measured in environmental samples primarily by ion chromatography. For perchlorate in drinking water, as with any other substance, it is the amount of exposure (the dose) that matters in assessing possible adverse effects. Manju , 9 Shaiju Param , 10 M. G. Rajamanickam , 11 U.G Unnikrishnan 12 et al. Keywords: Perchlorate; Drinking Water; Toxicity; Health Effects; Treatment Technologies. Perchlorate exerts its effects by competing with iodide at the sodium-iodide symporter (NIS), the transport system that transports iodine into the thyroid gland. Perchlorate in Water Supplies: Sources, Exposures, and Health Effects Craig M. Steinmaus1 Published online: 30 March 2016 # Springer International Publishing AG 2016 Abstract Perchlorate exposure occurs from ingestion of nat-ural or man-made perchlorate in food or water. 0.2.1.1 ACUTE EXPOSURE. Perchlorate is used in a variety of industrial products including missile fuel, fireworks, and fertilizers, and industrial contamination of drinking water supplies has occurred in a number of areas. Subjects with high perchlorate (n=1939) had thyroxine concentrations that were 5.0% lower (mean … The health effects of perchlorate salts are due to the perchlorate itself and not to the other component (i.e., magnesium, ammonium, potassium, etc.). What are the Human Health Effects of Perchlorate? Iodide is an essential component in two hormones produced by the thyroid. In a number of sub-chronic perchlorate studies, increased thyroid follicular cell hypertrophy and hyperplasia were observed in some of the treated animals [EHP 110:927–937 (2002)], the triangle and diamond symbols in the key were transposed. The health effects of perchlorate salts are due to perchlorate itself, and not to the other components (i.e., magnesium, potassium, ammonium, sodium, lithium). Perchlorate was first discovered to affect the thyroid 50 years ago, but only recently has research focused on its effects at low levels. 0.2.1.1 ACUTE EXPOSURE . It can be removed from water by anion exchange or membrane filtration. This interference may lead to developmental defects. Perchlorate affects the ability of the thyroid gland to take up iodine, an important chemical needed to make hormones that regulate many body functions after they are released into the blood. Largest study to date of perchlorate during pregnancy and maternal serum thyroid hormone levels. 0.2.1 SUMMARY OF EXPOSURE. The amounts of perchlorate used in these animal studies are huge, relative to potential human exposure. @ high doses (70,000–300,000 ppb) administration of potassium perchlorate considered standard of care in united states, , remains approved pharmacologic intervention many countries. non-cancer health effects over a specified duration of exposure (ATSDR 2008, 2016). Top of Page . Key points with regard to comparative risk and risk management issues related to both ecological and human health effects will also be discussed. Perchlorate is a naturally occurring and manmade chemical that can affect the functioning of the thyroid gland at sufficiently high doses. Adverse impact on the developing fetal brain a short overview of the thyroid above certain exposure levels and health! 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