EDF Health

EPA identifies another risky chemical: Can it succeed in using TSCA to restrict it?

By Lindsay McCormick / Published: March 31, 2015

Lindsay McCormick is a Research Analyst.

Last week, EPA released a risk assessment on the chemical N-Methylpyrrolidone (NMP).  NMP is produced and imported into the U.S. in huge quantities (184 million pounds reported in 2012), and has a variety of uses including petrochemical processing, making plastics, and paint stripping.

Experiments in laboratory animals demonstrate that exposure to NMP during pregnancy leads to adverse developmental outcomes in the offspring, such as low birth weight, skeletal malformations, and mortality (see here and here).

EPA’s assessment focused exclusively on NMP exposure from its presence in products used to remove paint and other coatings.  Because of NMP’s potential to disrupt fetal development, EPA assessed exposures in women of childbearing age.

EPA found that exposure to NMP-based paint strippers in women of childbearing age beyond four hours per day presents risks that cannot be mitigated from use of protective gear such as gloves and respirators.  Risks obviously could be greater, even for shorter exposure times, if protective equipment is not consistently used.   Read More »

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Evidence mounts on BPA’s adverse effects on human health

By Lindsay McCormick / Published: January 26, 2015

Lindsay McCormick is a Research Analyst.

Bisphenol A (BPA) is a high production volume chemical that is used to make polycarbonate plastics and epoxy resins.  It is commonly found in food and beverage packaging, such as plastic bottles and the lining of food cans, as well as thermal paper receipts (see our previous blog).  BPA is widely-recognized as an endocrine-disrupting chemical, meaning that it can alter the normal functioning of the body’s hormonal system.  Hundreds of studies have been published associating BPA exposure with health effects, ranging from cancer to obesity to attention-deficit hyperactivity disorder.  Data from the Center for Disease and Control (CDC) show that nearly all people tested have BPA in their bodies.

Despite a plethora of data, numerous calls for action (for example, see here, here and here), and comprehensive regulation in France, it does not seem that national regulation of BPA in food packaging in the U.S. will be happening any time soon.  The official position of the U.S. Food and Drug Administration (FDA) is that, while BPA exhibits endocrine-disrupting properties at high doses, it is safe at the current levels occurring in food.  Although the FDA banned the use of BPA-based materials in baby bottles, sippy cups, and infant formula packaging in 2012, FDA said it based this action on changes in the market, rather than safety concerns.

In the fall of 2014, FDA completed a four-year review of the literature, including more than 300 scientific studies, and concluded that the information does not “prompt a revision of FDA’s safety assessment of BPA in food packaging at this time.”

The European Food Safety Authority (EFSA) recently followed suit with their announcement that BPA does not pose a health risk to consumers, including children, at current exposure levels.  (This is in contrast to the action of several EU member states, which have banned BPA in food contact materials for children under 3 years of age over the past few years.)

Meanwhile, scientists continue to churn out studies linking low-level BPA exposure to a variety of health effects.  In this post, we discuss several new studies.   Read More »

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Getting under the surfac-tants: EDF comments support EPA regulations to limit their risks

By Lindsay McCormick / Published: January 15, 2015

Lindsay McCormick is a Research Analyst.  Richard Denison, Ph.D., is a Lead Senior Scientist. 

Today EDF submitted comments supporting EPA’s proposal to limit the use of two groups of toxic chemicals that have historically been widely used as, or to make, surfactants in consumer and commercial cleaning products.  The chemicals, nonylphenols (NPs) and nonylphenol ethoxylates (NPEs), are produced in high volumes for a variety of industrial uses and consumer products, some of which have led to widespread water pollution.  The chemicals are highly toxic to aquatic organisms, and also pose significant potential human health risks.

In October, EPA proposed a Significant New Use Rule (SNUR) for these chemicals that would require any company intending to begin manufacture or import of these chemicals to notify EPA prior to doing so, thereby allowing EPA to evaluate the risks associated with the proposed use of the chemical and to take action if appropriate.

SNURs are one of the few regulatory tools that EPA has to seek to restrict the use of chemicals under the nation’s outdated chemical safety law, the Toxic Substances Control Act (TSCA).

While EDF’s comments generally support EPA’s proposed rule, they also raise some concerns.  Some highlights of our comments are described below.   Read More »

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More than skin-deep: Have we underestimated the role of dermal exposures to BPA?

By Lindsay McCormick / Published: October 23, 2014

Lindsay McCormick is a Research Analyst.  Richard Denison, Ph.D., is a Lead Senior Scientist. 

Bisphenol A (BPA) is an endocrine-disrupting chemical, and has been associated with health effects such as premature puberty and developmental neurotoxicity.  Massive quantities of BPA – about 10 billion pounds and rising – are produced each year, making it one of the highest volume chemicals in commerce.  For that reason alone, it may not be surprising that scientists find BPA in the urine of nearly all people they test. 

It has generally been thought that exposure to BPA primarily comes from dietary sources (see here and here) due to its use in food packaging products such as metal cans and polycarbonate bottles.  Based on these concerns and market pressure, FDA amended its regulations to no longer provide for the use of BPA-based materials in baby bottles, sippy cups, and infant formula packaging, and France passed a law banning BPA in all food packaging containers as a precautionary measure. 

However, there is growing evidence that non-dietary sources of BPA exposure may be important.  One potentially overlooked but significant source of exposure is the use of BPA to make thermal receipts, which are commonly used in cash registers and ATMs.  Unlike BPA used to make food packaging, which uses polymerized or otherwise chemically bound BPA molecules, thermal receipts are coated with BPA in free form, only loosely attached to the paper.

A study just published by researchers at the University of Missouri and the Universite de Toulouse suggests that we may be underestimating the role of dermal exposure to BPA from handling of thermal receipts, especially in certain common settings.  The researchers tested the impact that use of a hand sanitizer immediately preceding handling a thermal paper receipt has on the transfer and absorption of BPA.  Hand sanitizers and other skin care products may contain chemicals called “dermal penetration enhancers,” which increase skin permeability, for example, to facilitate drug delivery.  Read More »

Posted in Emerging science, General interest, Health policy, Health science, Regulation / Tagged , | Comments are closed

Missing the forest for the trees? Are we addressing the biggest risks from exposure to phthalates?

By Lindsay McCormick / Published: September 22, 2014

Lindsay McCormick is a Research Analyst.  Richard Denison, Ph.D., is a Lead Senior Scientist. 

A recent study published in Environmental Health Perspectives is the first to demonstrate a link between childhood asthma and prenatal exposure to certain phthalates.  Phthalates are a group of chemical plasticizers used in hundreds of everyday products, including home construction materials, toys, food packaging, medical devices, and synthetic fragrances found in personal care products, cleaning products, cosmetics, and air fresheners.  For the most part, it is impossible for the average consumer to know what products are made with phthalates; however, if you see the word “fragrance” listed on your shampoo or sun screen, it may well contain a phthalate.  

Several studies have suggested that phthalate exposure may have an adverse impact on children’s respiratory health (for example, see here, here, and here).   However, none of these studies has considered the potential role of prenatal exposure – exposures to the fetus in the womb – to phthalates.

The prenatal period is a critical developmental window for lung and respiratory health.  Thus, researchers at the Columbia Center for Children’s Environmental Health (CCCEH) hypothesized that prenatal phthalate exposure would be associated with later development of asthma in childhood.  To investigate this hypothesis, the researchers measured phthalate metabolite levels in the urine of 300 women in the 3rd trimester of pregnancy, and then followed the children of these women to assess the extent to which they developed asthma between the ages of 5 and 11.  Read More »

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