Its stainless steel dish so can I put it in the oven at 250c/482f ?
When you ask "can I put it in the oven?" you're actually not asking a whole question. Can you put it in the oven? Of course you can. Will anything happen to it and your food that you don't like? Ah, that is the other half, right? What might happen?
If the pan is thick, and not a lot of it will be empty and exposed, then it should be fine. Another thing to consider is how you're going to get it out again after cooking. I don't see any handles.
Only if you are cooking something in it. That's a pretty high temp and your stainless is going to get stained.