Chemical sleuthing leads to detection of little-known flame retardant in the environment

April 16, 2018, Indiana University
Marta Venier. Credit: Indiana University

Chemists at Indiana University have published research findings on their discovery of a new and relatively unknown flame retardant in the environment. Their study is the first to detect the potentially toxic chemical in North America.

The chemical, called TTBP-TAX, is part of a new class of triazine-based "alternative" compounds that have been introduced as substitutes for earlier generations of flame retardants that were banned or removed from the market because of health and environmental concerns.

The researchers found the chemical not only in an electronic waste facility, where it would be expected, but in the bedrooms and living rooms of homes in Bloomington, Indiana.

"We don't know much about these compounds," said Marta Venier, a scientist in the School of Public and Environmental Affairs at Indiana University Bloomington and the study's lead author. "This research shows they are in the environment and we come into contact with them, but we don't know much about their effects."

The study was published in the journal Environmental Science & Technology. Additional authors are Jiehong Guo, William Stubbings and Kevin Romanak from the IU School of Public and Environmental Affairs; Linh Nguyen, Liisa Jantunen, Victoria Arrandale and Miriam Diamond from the University of Toronto; and Lisa Melymuk from the Research Center for Toxic Compounds in the Environment in the Czech Republic.

Flame-retardant chemicals have been widely used in consumer products and building materials. They often escape into the environment, where they may persist for years, and have been linked to a variety of and environmental problems.

The IU researchers' discovery came about by accident and involved chemical detective work led by Guo, the paper's first author. They were analyzing samples from an electronics recycling facility in Canada, measuring known flame retardants. During the analysis, they noticed that the mass spectrometer produced a peak indicating the presence of a chemical they didn't recognize.

By analyzing the structure of the chemical, they guessed it was TTBP-TAX, which had been previously reported in the environment in a 2014 study from the Netherlands. They obtained lab standards and confirmed their hypothesis. Then they decided to look for it in additional samples.

They found significant concentrations of the in all of the dust and air samples from the Canadian e-waste recycling facility. They also found it in 70 percent of household dust samples collected from 20 homes near where the IU researchers live in Bloomington, Indiana. They did not find the compound, or found only trace amounts, in outdoor air, water and sediment samples.

TTBP-TAX, also known as 2,4,6-tris(2,4,6-tribromophnoxy)-1,3,5-triazine, has been manufactured in Asia and imported to the U.S. by several companies, primarily for use in plastic casings for electronics products. Manufacturers say the product is safe, but it can easily degrade to the compound 2,4,6-TBP, which is linked to acute toxicity in fish and to reproductive and developmental toxicity in rodents.

"For most of these , we don't know their effects and toxicity," Venier said, "and until we know they are safe, we shouldn't be coming into contact with them."

She said it is likely that other triazine-based are in the but haven't been detected because scientists don't know about them or lack the analytical tools to measure them.

Explore further: Researchers discover that human hair and nails can tell toxic secrets

More information: Jiehong Guo et al, Alternative Flame Retardant, 2,4,6-Tris(2,4,6-tribromophenoxy)-1,3,5-triazine, in an E-waste Recycling Facility and House Dust in North America, Environmental Science & Technology (2018). DOI: 10.1021/acs.est.7b06139

Related Stories

NYC toddlers exposed to potentially harmful flame retardants

January 23, 2017

Researchers at the Columbia Center for Children's Environmental Health (CCCEH) within the Mailman School of Public Health report evidence of potentially harmful flame retardants on the hands and in the homes of 100 percent ...

Study finds flame retardants at high levels in pet dogs

April 26, 2011

Indiana University scientists have found chemical flame retardants in the blood of pet dogs at concentrations five to 10 times higher than in humans, but lower than levels found in a previous study of cats.

Recommended for you

What rising seas mean for local economies

February 15, 2019

Impacts from climate change are not always easy to see. But for many local businesses in coastal communities across the United States, the evidence is right outside their doors—or in their parking lots.

Where is the universe hiding its missing mass?

February 15, 2019

Astronomers have spent decades looking for something that sounds like it would be hard to miss: about a third of the "normal" matter in the Universe. New results from NASA's Chandra X-ray Observatory may have helped them ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.