Siddiqui, who has more than 13 million followers, has been suspended from the platform, the National Commission for Women has said.
The toddler was taken to hospital with serious burns.
"With my right hand I tried to grab the can and knock it out of her hand."
'We are concerned because the numbers appear to be going up,' said the head of London's metropolitan police.
As many as 25 women have been targeted in a wave of acid attacks in Iran in recent weeks, sparking protests and criticism of Rouhani's 'moderate' stance
Up to 25 women have been targeted in a wave of horrific attacks around the country, with some blaming rhetoric from conservative politicians