Thieves warned about toxic gas stash

Fifty cartridges containing toxic a gas used to kill foxes have been stolen from a southeast Queensland property.

Their disappearance has caused police to issue a safety warning to the thieves who took the Den-Co-Fume cartridges from a Meadowvale property last weekend.

The cartridges, which contain sodium nitrate and carbon, are easily ignited and emit a dark black smoke that dissipates an odourless gas.

Inhalation of the fumes can cause headaches, nausea, dizziness, weakness, unconsciousness and possibly death to humans.