I'm on the week 7 of a longer cycle.
I'd like to start HCG 250 IU twice a week.
But I only have 5000IU pregnyl.

I have Sterilized water in a 20ml bottle with rubber stopper. I'd like to use this to cut the HCG and make a 250IU/ml solvent.
The Bottle says:
AQUA DESTILLATO PRO INJECTIONE
Sterilized in 120 C , 20 min
And the last line. "Don't use it to make injection"

Can I use this water to cut the HCG? And Can I store the solvent for a month in fridge?
And why can't I use it to make injection??...

Or use 5000Iu once in a month? (and than I no need to use this "sterilized water"