What are some possible classification tests that one can use for o-nitrobenzoic acid?

I have analyzed an IR spectrum and found out that my compound (o-nitrobenzoic acid) has a nitro group, carboxylic group, and benzene ring. 


I was curious to know: if regioselectivity effects the solubility of the compound? If/If not regioselectivity effects the solubility of o-nitrobenzoic acid, what would be the best solubility test to run for o-nitrobenzoic acid since it has a carboxylic acid and a nitro group in the ortho-position? And, if I wanted to test o-nitrobenzoic acid functional groups, what would be some good classification tests to run?


