Evaporated Sodium Chlorite

I had a dozen bottles of Sodium Chlorite, I bought them a decade or so ago, put them in a cupboard and forgot about them.  Now I need to use them to make Chlorine Dioxide, but all the plastic bottles decomposed and the sodium chlorite leaked out into the cupboard where it evaporated and left piles of white salt.  

Can I take the piles of salt and mix it again with distilled water to turn it back into the Sodium Chlorite solution?  Or is the salt not NaClO2?