Liquid formula -warmed -how long will it be okay at room temp after cooling?

[HannahNeale]

So I've been using liquid formula as well as breastmilk this first week of baby being here.. we store the liquid formula in the fridge and then put the bottle in a cup of boiling water to bring it to room temp/slightly warm.. thing is I did this about half an hour ago anticipating a feed, then she fell back to sleep so it's still sitting there. Will it still be safe to use in the next hour?

 

[Pippacarney]

Use within two hours xxx