A landmark international study across five Central European countries has found hazardous chemicals in every single pair of headphones analysed, from premium models to cheap imports. Authors say the results reveal a systemic failure in consumer safety regulation across the electronics industry. The investigation, conducted as part of the EU-funded ToxFree LIFE for All project, analysed 180 samples of hard and soft plastic components from 81 headphone products marketed to children, teenagers, and adults in the Czech Republic, Slovakia, Hungary, Slovenia, and Austria.
This is a potentially interesting study but there is a key gap which is around the actual health risk.
The figures around safety mg/kg are to do with the rate the toxic materials leach out of an item, not the absolute concentration within the materials or artificial lab based maximum leach rates. The quoted 10 mg/kg is also not an actual limit:
The limit orignally proposed is not the same as the actual limit. As far as I can see it is 0.05mg/kg leach into food, 0.04mg/l for toys, and as far as I can see there are no other limits in place. They are essentially being restricted in food contacting materials and toys, and requiring clear labelleling in other uses: https://www.echa.europa.eu/hot-topics/bisphenols
What really matters is under what circumstances the “maximum concentrations of 351 mg/kg” were reached. If that is an artificial lab test with no relatability to real world situations then it’s meaningless. If that rate of leach occurs at body temperature with a bit of moisture then it’s very worrying. But even then the absolute amount of the bisphenols in the products also matters - for example it might be there amount mixed into the plastics in a ear bud is too small to actually be toxic to a human.
Without that information this feels like sensationalist reporting of the findings - the article is implying there is a health risk when there may be none, and they are also implying there is wrong doing or failure of the EU enforcement of its regulations when there may be none.
It is worth reading the disclaimer at the end; while their aims may be laudable they are not conducting independent research and it’s not clear their work is even peer reviewed. Instead this is a single issue lobbying group, part funded by EU funds, producing research with a political aim.
Great comment, thanks.