The discovery was made after the Swedish Chemicals Agency bought the goods and analyzed the contents.
One of the museums is the Mediterranean Museum, which sold a diadem containing too high levels of the dangerous substance lead. Sales were stopped this summer, but the diadem had been sold for seven years in 343 copies.
Too high levels of lead were also discovered in a napkin ring at the Vasa Museum, which had been purchased for over a year in hundreds of units. Now the napkin ring has been stopped from sale.
The Natural History Museum is being prosecuted for a pen case containing banned cadmium, a heavy metal that can damage the kidneys.
In October, the Technical Museum was also prosecuted for selling a usb charger with a key ring containing carcinogenic substances, DN writes.