What does the bacteriostatic water calculator do for HCG?

It divides the amount of powder printed on the vial by the volume of bacteriostatic water added, and reports the result as a concentration and as the amount sitting in each unit mark of a 1 mL U-100 insulin syringe. It is arithmetic. It does not say what amount to use.

Which HCG vial sizes are worked out here?

5,000 IU, 10,000 IU, 5 mg - one page each.

Why does the same vial have several possible concentrations?

Because the concentration depends entirely on how much water is added. The powder is fixed; the water is a choice. More water means a lower concentration and more volume per unit mark, less water means the opposite. That is the whole of the arithmetic.

Bacteriostatic water calculator for HCG

HCG is supplied in 3 vial sizes on this site (5,000 IU, 10,000 IU, 5 mg). Pick the size printed on your vial and the page works out what each water volume gives you, in IU/mL and in unit marks on a 1 mL U-100 insulin syringe.

Also searched as: hcg, human chorionic gonadotropin, hcg powder.

Every HCG vial size

Each card shows one example mix. Every page behind it works through a full range of water volumes.

How much bacteriostatic water do you need?

You need about 10 mL of bacteriostatic water to cover any HCG vial size on this page.

Every water volume in these charts is between 1 mL and 10 mL, so a single 10 mL vial of bacteriostatic water covers the largest of them exactly. Bacteriostatic water is sterile water that contains 0.9% benzyl alcohol as a preservative, which is what allows the same vial to be punctured more than once.

See the 10 mL vial

Storage and shelf life

Bacteriostatic water is sterile water that contains 0.9% benzyl alcohol as a preservative. The preservative is the reason a vial can be entered more than once rather than being discarded after a single use. An unopened vial keeps until the expiry date printed on it; once the stopper has been punctured, the discard window printed in the manufacturer’s insert for that vial applies.

Store water and mixed vials as the labelling for each one directs, out of direct light. If the liquid changes colour, goes cloudy, or shows anything floating in it, it goes in the bin rather than in a syringe.

How long bacteriostatic water lasts, in detail

Common questions

What does the bacteriostatic water calculator do for HCG?: It divides the amount of powder printed on the vial by the volume of bacteriostatic water added, and reports the result as a concentration and as the amount sitting in each unit mark of a 1 mL U-100 insulin syringe. It is arithmetic. It does not say what amount to use.
Which HCG vial sizes are worked out here?: 5,000 IU, 10,000 IU, 5 mg - one page each.
Why does the same vial have several possible concentrations?: Because the concentration depends entirely on how much water is added. The powder is fixed; the water is a choice. More water means a lower concentration and more volume per unit mark, less water means the opposite. That is the whole of the arithmetic.

HCG (human chorionic gonadotropin) is a prescription hormone supplied as a freeze-dried powder, labelled in International Units on most vials and in milligrams on some. It is available on prescription only. This site sells bacteriostatic water. It does not sell HCG.