The firm which runs the giant Grangemouth oil refinery and petrochemical site has been accused of refusing to attend talks at the conciliation service to try to resolve a dispute.
Unite said Ineos was behaving “recklessly” in rejecting the union’s request to use Acas.
Workers at the site have launched a work to rule and overtime ban in a row over the treatment of Unite convenor Stephen Deans. The union has warned it has not ruled out strikes.
Unite regional secretary Pat Rafferty said: “It is our view that Ineos is using Stephen Deans, who is an innocent man, and the country’s energy supplies as pawns in some twisted industrial game.
“The company’s inaction will force the union into industrial action which would inevitably put the nation’s fuel supply at risk. It will be Ineos’s refusal to engage that will be to blame should this happen.
“This latest move by Ineos to refuse the opportunity to use the conciliation service Acas to try to resolve this dispute is utterly baffling.”
An Ineos spokesman said: “Unite only wanted to go to Acas over the Stephen Deans issue, not the survival plan.
“There is an investigation going on into Stephen Deans that will be completed by October 18. Going to Acas without the facts is a pointless exercise.”