have chinese hcg here, 5000 iu bottle but the dilutent that comes with it is chinese cant read chinese and the only thing it says on it in english is 5000, hcg 2ml: 18mg. the pharmacist said the 18 mg was benzyl alcohol or some preserve but then he doesnt know chinese either, i dont want to use 5000 all at once. how long will this last in fridge if the dilutent is just straight water?