I remember someone many years ago talking about DOC being really good snorted, at least twice as potent. But I recommend against it, it's so potent, you can't weigh a single dose accurately on a scale, especially if you're cutting it in half from a normal oral dose. You could make a nasal spray with a spray bottle that releases a known volume per spray and dose it that way. But I'd be really careful, DOC causes vasoconstriction and there have been deaths from it (granted, huge doses). Still, I would be worried that snorting it would increase the side effects due to more rapid onset and blood serum concentration. If you must try, start very small and make sure you know what you're doing and use a nasal spray with an accurate spray bottle and be damn sure of your dose.