An urgent safety warning has been issued for Queensland after a one-touch death drug 10,000 times more potent than morphine was found in Brisbane.

Carfentanyl, a powerful anaesthetic used to sedate elephants, was intercepted at a Brisbane mail centre by Australian Border Force officials.

Carfentanyl is a synthetic analog of fentanyl (pictured) and has been used to sedate elephants. It can be ingested, injected or enter a person's system through touch.

The discovery was made earlier in the month and after scientific tests it was proven to be the drug that can kill a person who simply touches it.

"I am advised that Carfentanyl is a highly toxic and potent synthetic based drug, with a 0.002mg dose enough to kill a person," Police Minister Mark Ryan said.