I once I.M.-ed the very similar 2C-C and experienced a freaky and unpleasant sensation / effect on my breathing and chest. It really does not feel right, I think I'd skip I.M.-ing any psychedelic phen over 10 mg. Also I imagine it is not great for the muscle you inject into. But then again neither is snorting or plugging - snorting is even worse since it is not dissolved / dilute yet upon admin.