In late 2024, researchers from Toxic-Free Future and Vrije Universiteit Amsterdam published a study in Chemosphere measuring flame retardants in black plastic products sold in the US: kitchen utensils, takeout trays, children’s toys, hair accessories. The coverage came in two waves. First “throw out your black spatula.” Then, after the authors corrected a math error, “the black spatula scare was overblown.” Neither wave gave a reader enough to decide what to do with the black plastic utensils in the drawer.
The short version: 20 of the 203 products tested carried elevated bromine, and 17 of those 20 contained brominated or organophosphate flame retardants, sometimes several in one product. A sushi tray contained decaBDE, a flame retardant, at 11,900 parts per million. The corrected math puts the estimated intake from a contaminated utensil at roughly 8 percent of the EPA’s daily reference dose, not the near-limit figure the first headlines ran with.
So the answer isn’t really “toss everything black” or “the study fell apart.” We think it’s more about which items you own and what you do with them. Most of the difference comes down to heat.
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What the Study Found
The team bought 203 black plastic products on the US market. Of those, 109 were kitchenware. The first step they took was screening for bromine. Bromine is a chemical element that slows combustion, which is why manufacturers base the most common class of flame retardants on it, and it has no reason to be in a kitchen utensil. Finding it at elevated levels is a strong indicator that flame retardants are present. Twenty products came back above 50 parts per million, among them nine kitchen utensils and two take out containers. Basically one in ten.
Those 20 went to full chemical analysis. Seventeen contained flame retardants, 11 different compounds were detected across the set, and 16 of the 17 contained more than one, anywhere from two to nine in a single product. The most frequently detected were decaBDE (BDE-209), TBBPA (tetrabromobisphenol A), and 2,4,6-tribromophenol, which is a newer compound used as a replacement for banned flame retardants. decaBDE alone turned up in 14 of the 20 products analyzed.
There were two products that stood out. The sushi tray carried 11,900 ppm of decaBDE, which is 1.2 percent of the tray by weight. A string of black beads sold as a kids’ costume accessory carried 22,800 ppm of total flame retardants, 2.3 percent of its weight, which was among the highest levels found, as CNN reported.
decaBDE belongs to the PBDE class of brominated flame retardants, and the EPA banned it in 2021 after its review linked the chemical to cancer and to thyroid, developmental, reproductive, and immune effects. In the study samples it appeared at 5 to 1,200 times the European Union’s limit of 10 ppm, per the Food Packaging Forum’s summary.
Why Flame Retardants Are in a Spatula
Nobody puts flame retardants in kitchen tools on purpose. Manufacturers add them to the plastic housings of electronics, TV enclosures especially, so a spark inside the device does not become a house fire. That is a reasonable use. The problem starts when those housings get recycled.
E-waste plastic is mostly black, and when it enters the recycling stream, the flame retardants stay in the material. The material then becomes spatulas, serving spoons, trays, and toy beads. The study’s own chemistry supports this route: flame-retardant levels ran far higher in styrene-based plastics, the ABS and HIPS types electronics housings are made from, with median levels 30 times those in plastics like nylon that electronics rarely use. Toxic-Free Future had found the same chemicals in TV enclosures it tested in 2017 and 2019, which is what pointed the group at black household plastic in the first place.
The color itself makes sorting harder. Recycling facilities identify plastic with near-infrared scanners, and carbon black, the pigment in most black plastic, absorbs that infrared signal. The scanners cannot read the resin, so the black stream stays murky, and e-waste plastic slips through into consumer goods.
None of this breaks US rules. None of the flame retardants found in the study are regulated in recycled plastics in the US, a gap the study’s authors keep pointing at.
One Example, Two Corrections
The study included one worked example: how much decaBDE a person would take in by cooking daily with a contaminated utensil. The authors estimated 34,700 nanograms a day and compared that number to the EPA’s reference dose, the intake level below which daily contact over a lifetime is not expected to cause any harm. Their comparison put a utensil user near the limit.
The comparison was incorrect. In December 2024 the journal published a correction: the reference dose for a 60 kilogram adult is 420,000 nanograms per day, not 42,000. The estimated intake sat around 8 percent of the limit, not 80. NPR ran a clarification the day after airing the original finding. Then in July 2025 a second correction lowered the utensil exposure estimate itself.
What the corrections changed: the exposure math in one illustrative example. What they left standing: every measurement in the paper. The contaminated products still contained a banned flame retardant at up to 1,200 times the EU limit, the e-waste route into food-contact items still holds. The journal corrected the paper; it did not retract it, and nobody has challenged the lab work.
One more piece of math belongs next to the 8 percent. A reference dose covers one chemical on its own, and 16 of the 17 contaminated products carried two to nine flame retardants each. How those combinations add up, on top of everything else contributing to a person’s cumulative exposure, is a question no reference dose covers.
How the Chemicals Get Into Food
Flame retardants are mixed into plastic rather than chemically bonded to it, so they migrate out over time, and heat and fat speed the migration. The same process moves chemicals out of food packaging when heat meets plastic. A black spatula gets used against hot oil, most days, for years. For this type of chemical, that is close to the worst-case contact pattern in a kitchen.
Earlier research cited in the study has measured flame retardants moving from utensils into food and from toys into children’s saliva when they put these things in their mouths. Both routes move the chemical into the person.
PBDEs also stay there. They accumulate in fat tissue and leave slowly, which is why body-burden studies matter more for this class than for chemicals the body clears in hours. A 2024 study of US adults found that people with the highest PBDE blood levels were about 300 percent more likely to die of cancer over the follow-up period than people with the lowest levels. That is an association in observational data, not proof that PBDEs caused the deaths, and the blood levels reflect decades of intake from many sources, furniture and mattress foam above all. It is still the direction the human evidence points for a chemical class the US spent thirty years phasing out.
Which Black Plastic to Replace First
Nine of ten products in the study showed no elevated bromine, so clearing the house of everything black is not necessary. The challenge is that recycled content carries no label. A contaminated spatula and a clean one look identical, and nothing on the package says whether the plastic started as a TV housing.
First, get rid of the utensils that meet heat: spatulas, slotted spoons, ladles, pasta forks, anything that stirs hot oil or scrapes a hot pan. Heat, fat, and daily contact is where chemical to food migration runs highest. Replace these with stainless steel, wood, or silicone. Silicone tolerates high heat and does not use brominated flame retardants. Swapping these will run about $20-$40 for a wooden spoon, a stainless ladle, and a silicone scraper. Also, look for EU made utensils which fall under the EU’s 10 ppm decaBDE cap, and have a shorter, more transparent supply chain that is easier to trust than a random import. China restricts decaBDE too, but a limit on one chemical does not make a product clean; imported goods of every kind still commonly off-gas VOCs from finishes, adhesives, and the plastic itself. Wooden and silicone products are not automatically in the clear either, so look for reputable companies.
Second, the black plastic that ends up in children’s mouths. Costume beads carried some of the highest flame retardant levels in the study, and putting in the mouth moves chemicals into saliva directly. Black plastic toys and beads for young kids are the one category where replacing the item is the only realistic option, because it is too difficult to watch a child every minute and keep a toy out of their mouth.
Third, which is a habit that happens often…stop reheating food in black takeout trays. The tray arriving with warm food is brief contact. A microwave run in the same tray is heat applied straight to the plastic, and the 11,900 ppm sushi tray is the reason this habit makes the list. Transfer leftovers into glass or stainless food storage containers.
Cutting boards are a similar problem. A knife cutting a plastic board sheds microplastic particles into food, a separate mechanism from flame-retardant migration, with its own set of trade-offs.
Where the Regulation Stands
The US position is short: there is no rule. No federal standard limits flame retardants in recycled plastic, including recycled plastic that touches food. The FDA reviews food-contact substances that manufacturers intend to add; contamination arriving with recycled feedstock falls between the agencies, and the EPA’s chemical bans stop at manufacture and import.
Other governments have more restrictions. The EU caps decaBDE in products at 10 ppm. Canada has moved to tighten its 2012 toxic-substances regulations covering PBDEs. Australia’s remaining exemptions for decaBDE mostly expire in January 2027, with carve-outs for car parts until 2036 and aircraft until end of service. In the US, the pressure is coming through the courts instead: a coalition led by Earthjustice sued the EPA in 2024 over its handling of decaBDE, citing the black plastic utensil findings directly. The study’s authors are also pushing for recycled-content limits through the Global Plastics Treaty negotiations, which remain open.
Common Questions
Was the black plastic study retracted?
No. It was corrected twice, in December 2024 and July 2025, both times on the same exposure calculation in one worked example. The flame-retardant measurements in the products were not part of either correction, and the paper stands in the journal.
Is all black plastic contaminated?
The study cannot answer that as broadly as it sounds. Twenty of 203 products screened above the bromine threshold, but products below it were never fully analyzed, the screen does not detect organophosphate flame retardants at all, and recycled feedstock varies from batch to batch. What the study shows is that contaminated items are on US shelves and nothing visible identifies them, so sort by use: heated contact first, kids’ mouthing second, reheating in takeout trays third.
Why do black plastic utensils turn white in the dishwasher?
Heat and detergent wear down the surface of the plastic, and the chalky white film is that worn layer showing. The white bloom is not a flame-retardant signal, and no test can be read from it. It does mark a utensil whose surface has started breaking down, and a degraded surface sheds more material into food, so a utensil that has gone white and rough is the natural first one to replace.
Are black plastic utensils banned anywhere?
The utensils are not banned. Several chemicals found in them are: decaBDE has been banned or restricted by the EPA, at least six US states, the EU, and China. The gap is that those bans cover producing the chemical, not its arrival in products through recycled plastic.
Do black plastic food storage containers need to go too?
Cold storage moves far less of any additive than hot contact does. The item to retire is whichever container goes into the microwave. Moving storage and reheating to glass or stainless steel makes the whole category a non-issue.
I have cooked with black plastic utensils for years. How concerned should I be?
The corrected estimate put daily exposure from a contaminated utensil at about 8 percent of the EPA reference dose for decaBDE. That figure also describes one chemical at a time, while most of the contaminated products carried several. Nothing regulates flame retardants in the recycled plastic entering US products today, so a new utensil is as much of an unknown as an old one. Swap the ones that meet heat and this source is closed.