Reports claimed Interpol, the world’s largest police organisation, raised the alarm following the theft of a lorry in the city of Zedelgem, Belgium.
It is thought the chemicals could be used to produce explosives and authorities are keen to recover the truck as quickly as possible.
According to Spanish reporter Laura Alonso, theĀ truck was carrying a volatile substance known as “Radiacid”.
The trailer reportedly has a registration number of 1-QEB-708 and is believed to be black.
There are fears the thieves may have changed the numberplates, which would make the truck even more difficult to locate and identify.
Border crossings are on alert in France, Luxembourg, Germany, Italy and the Netherlands.