Dinitrophenol 2,4 vs Sodium Dinitrophenol 2,4

Wondering if anyone can tell me if there is a difference between Dinitrophenol and Sodium Dinitrophenol

I find some sites that sell DNP with the Sodium and list it as fertilizer, but looking at the chemical compound, it doesnt seem different in any way.

i see it listed as sodium 2 4 dinitrophenolate