Iraqi officials have shown the BBC footage, which they say proves Islamic State militants are using chlorine gas in roadside bomb attacks.
The videos show bomb disposal teams carrying out controlled explosions, which send plumes of orange smoke into the air.
The bombs contain small concentrations of a chemical agent and in open ground are unlikely to be lethal.
Experts say they are designed to create fear rather than harm.
There have been multiple reports that IS has been deploying chlorine gas since late last year, but Iraqi officials say their footage confirms its use.