I noticed its a little bit shorter of a shelf-life than GH.
I regularly divide 1 vial of GH into 7 shots and take 1 a day for a week. With IGF, I don't think I'd want to leave it reconstituted in liquid form for 7 days before taking.
I'd up the benzyl alc and I'd make up however many syringes I needed for the run. I'd keep 2-3 in fridge and the rest in freezer and pull 1 out everyday to replace one I was taking (or two if taking two shots, etc).
Frozen it should last forever.