No. don't toss it. I keep my powders in the fridge personally but I've read this isn't necessary. Doesn't hurt either!
Once it's reconstituted it lasts at least 30 days according to the literature. I've never kept any reconstituted longer than 30 days because I use it all, but have read it lasts 60d of kept refrigerated. It does lose potency over time until eventually it's inert. I wouldn't worry about it if less than 45 days. Keep it refrigerated always. Even of it's not reconstituted yet. 1500iu will be gone well before 30 days if you're doing the common dose of 200iu every 3 days.
If you hcg is constituted with bac water instead of the solvent it will not lose potency for 60 days if you keep it in the fridge. Even at the 60 day mark it doesn't go bad like i said just looses potency.
Thanks, mine is the solvent, I think .
Any ideas on lifespan of solvent once mixed.