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HCG Mixing (Pregnyl), Storing 1 Month Supply in Fridge?

I intend to use pregnyl 5000 which comes with 1 ampoule hcg ang 3 1ml ampoules of solvent (sodium chloride).

If i use 2.5ml solvent with 5000ius of powder mixed in a big syringe (ex: 5ml) i will get 2000ius per 1ml. can I use the big syringe to back-fill smaller syringes and store them in the fridge? this way i will have a 1 month worth of supply and no need for extra Bacteriostatic water vial

thank you