I have some old powders that i want to use. how could i test them to see if the active ingredient is still active? can i do a melting point test or would i need to just try it and "feel" if its still good?
also, if they are still good, how do u homebrew powders with hpbcd? just use bacteriostatic water and reconstitute it then add my powders to it?
sorry if i placed this in the wrong section.