The Department of Mines and Petroleum is taking action against a company responsible for a truck that crashed on Great Eastern Highway in December.
The truck rolled and spilt sodium cyanide and diesel fuel on the road, delaying Christmas travellers for several hours.
The DMP has found the truck failed to display adequate placarding and did not have correct documentation for the materials it was transporting.
The DMP has issued a warning to dangerous goods transporters following a number of other incidents.
Police allege a truck stopped in the Wheatbelt was carrying more than 450 litres of highly toxic chlorine gas without proper documentation of personal protective equipment.
The vehicle also failed to display dangerous goods placards and the DMP have taken enforcement action against the company involved.
Both the driver of the vehicle and the company responsible for it have been summoned to court for several offences.