Quality of IPA

How can I check the quality of IPA? We don't have any good suppliers here, So we have to buy it from local chemical stores. How can we determine that which IPA is good for printing?

 

You can use any normal IPA, 70% or higher, because will be used in water. IPA for medical purposes is too expensive, it´s waterfree.
But it´s only one point, check your water for hardness. Usually less than 10% IPA should be enough.