quick dnp ?

Ordered some dnp, got here fine. Opened the package, and 1 of the 20 had broke open during the shipping. Now all of them covered in the dnp. I think i read somewhere that if the actual dnp is consumed and gets on your throat it will make it swell up and have all kinds of problems. I oviously can't wash them off, or the caps will start to disolve. What about just wipping them off with a clean napkin the best i can? Also, is there a visable diffrence between crystal and powder dnp. Cause i have seen powder and this is supposed to be crystal, and they look identical.

anyone?