Consumers wanting to rid their homes of toxic chemicals
should follow their noses.
A study led by the University of Washington discovered that
25 commonly used scented products (like laundry detergent and air freshener)
emit an average of 17 chemicals each. Of the 133 different chemicals detected,
nearly a quarter are classified as toxic or hazardous under at least one
federal law.
Only one emitted compound was listed on a product label, and
only two were publicly disclosed anywhere.
Even so-called "green" products were not "safe."
"We analyzed best-selling products, and about half of
them made some claim about being green, organic or natural," said lead
author Anne Steinemann, a UW professor of civil and environmental engineering
and of public affairs. "Surprisingly, the green products' emissions of
hazardous chemicals were not significantly different from the other
products."
More than a third of the products emitted at least one
chemical classified as a probable carcinogen by the U.S. Environmental
Protection Agency, and for which the EPA sets no safe exposure level.
Manufacturers are not required to disclose any ingredients
in cleaning supplies, air fresheners or laundry products, all of which are
regulated by the Consumer Product Safety Commission. Neither these nor personal
care products, which are regulated by the Food and Drug Administration, are
required to list ingredients used in fragrances, even though a single
"fragrance" in a product can be a mixture of up to several hundred
ingredients, Steinemann said.
So Steinemann and colleagues have used chemical sleuthing to
discover what is emitted by the scented products commonly used in homes, public
spaces and workplaces.
The study analyzed air fresheners including sprays, solids
and oils; laundry products including detergents, fabric softeners and dryer
sheets; personal care products such as soaps, hand sanitizers, lotions,
deodorant and shampoos; and cleaning products including disinfectants,
all-purpose sprays and dish detergent. All were widely used brands, with more
than half being the top-selling product in its category.
Researchers placed a sample of each product in a closed
glass container at room temperature and then analyzed the surrounding air for
volatile organic compounds, small molecules that evaporate off a product's
surface. They detected chemical concentrations ranging from 100 micrograms per
cubic meter (the minimum value reported) to more than 1.6 million micrograms
per cubic meter.
The most common emissions included limonene, a compound with
a citrus scent; alpha-pinene and beta-pinene, compounds with a pine scent;
ethanol; and acetone, a solvent found in nail polish remover.
All products emitted at least one chemical classified as
toxic or hazardous. Eleven products emitted at least one probable carcinogen
according to the EPA. These included acetaldehyde, 1,4-dioxane, formaldehyde
and methylene chloride.
The only chemical listed on any product label was ethanol,
and the only additional substance listed on a chemical safety report, known as
a material safety data sheet, was 2-butoxyethanol.
"The products emitted more than 420 chemicals,
collectively, but virtually none of them were disclosed to consumers,
anywhere," Steinemann said.
Because product formulations are confidential, it was
impossible to determine whether a chemical came from the product base, the
fragrance added to the product, or both.
Tables included with the article list all chemicals emitted
by each product and the associated concentrations, although they do not
disclose the products' brand names.
"We don't want to give people the impression that if we
reported on product 'A' and they buy product 'B,' that they're safe,"
Steinemann said. "We found potentially hazardous chemicals in all of the
fragranced products we tested."
The study establishes the presence of various chemicals but
makes no claims about the possible health effects. Two national surveys
published by Steinemann and a colleague in 2009 found that about 20 percent of
the population reported adverse health effects from air fresheners, and about
10 percent complained of adverse effects from laundry products vented to the
outdoors. Among asthmatics, such complaints were roughly twice as common.
The Household Product Labeling Act, currently being reviewed
by the U.S. Senate, would require manufacturers to list ingredients in air
fresheners, soaps, laundry supplies and other consumer products. Steinemann
says she is interested in fragrance mixtures, which are included in the
proposed labeling act, because of the potential for unwanted exposure, or what
she calls "secondhand scents."
As for what consumers who want to avoid such chemicals
should do in the meantime, Steinemann suggests doing what Grandma did: cleaning
with vinegar and baking soda and opening windows for ventilation. And if there's no old-fashioned alternative
for the product, find one that's fragrance-free.
"In the past two years, I've received more than 1,000
e-mails, messages, and telephone calls from people saying: 'Thank you for doing
this research, these products are making me sick, and now I can start to
understand why,'" Steinemann said.
The article is published online today in the journal Environmental
Impact Assessment Review.
Steinemann is currently a visiting professor in civil and
environmental engineering at Stanford University. Co-authors on the study are
Ian MacGregor and Sydney Gordon at Battelle Memorial Institute in Columbus,
Ohio; Lisa Gallagher, Amy Davis and Daniel Ribeiro at the UW; and Lance
Wallace, retired from the U.S. Environmental Protection Agency. The research
was partially funded by Seattle Public Utilities.
What Makes It Sweet Is What Makes It Toxic
Study finds scented household items contain toxic chemicals not listed on the label...