Is there a away of measuring the alpha and beta acid levels in it to derive some type of reference point? That would give you some direction on the best use of the powder. Large alphas are typically reserved for earlier (bitter) additions and the mid to low alphas are often used in flavoring and aroma additions, as well as dry hopping. I would say if you don't have access to that information, then try as a first wort hop, as that typically comes through as a more mellow hop addition (though it seems counterintuitive it seems true for most of us here).
Good luck and please report back with your results and the source of this powdered product.