Are organophosphate flame retardants in furniture making your indoor air toxic?

What's actually in it

Couches, mattresses, carpet padding, and electronics are often treated with organophosphate esters (OPEs). These are flame retardant chemicals designed to slow fires, but they don't stay bonded to the materials. They off-gas into the air and settle into house dust. Because your home is sealed up most of the day, these chemicals build up indoors to levels far higher than what you'd breathe outside.

What the research says

A 2026 study in Environ Sci Technol measured OPE levels in indoor and outdoor air across homes nationwide in China. The findings were stark: indoor OPE concentrations were many times higher than outdoor levels. The chemicals came primarily from furniture foam, building materials, and electronic equipment inside homes.

The researchers calculated health risks for people breathing this air every day. Some of the OPEs they detected are suspected carcinogens, while others can disrupt hormones and harm the nervous system. Children face higher risk because they breathe more air per pound of body weight and spend more time on the floor near dust where these chemicals concentrate.

Opening windows regularly is the simplest way to dilute indoor OPE levels. Vacuuming with a HEPA filter traps contaminated dust instead of spreading it back into the air. When buying new furniture, look for items that skip chemical flame retardants and use barrier fabrics or naturally fire-resistant materials like wool instead.