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How-to · reconstitution
In this example, 2 mL of bacteriostatic water in a 5 mg DSIP vial gives 2.50 mg/mL. An example 250 mcg amount is then 10.0 units on a U-100 syringe.
This example lands on a syringe line. More water makes a weaker mix and a bigger draw. Less water makes a stronger mix and a smaller one. The amount of DSIP stays the same. Use the diluent and volume specified for your product; the arithmetic alone does not choose them.
| Water added | Concentration | Per U-100 unit | Example: 250 mcg = |
|---|---|---|---|
| 2 mL | 2.50 mg/mL | 25 mcg | 10.0 units |
| 3 mL | 1.67 mg/mL | 16.67 mcg | 15.0 units |
Straight arithmetic: concentration = 5 mg ÷ liquid volume, and 1 U-100 unit = 0.01 mL. The example column shows the math at 250 mcg; it is not a dose recommendation.
The table compares possible concentrations; it does not establish which diluent or volume suits your product. Follow its dispensing instructions.
“Hard to measure” means the example draw is below two U-100 units. “Won’t fit” means it exceeds this syringe’s capacity.
DSIP stands for delta sleep-inducing peptide. It is nine amino acids long, and it was recovered in 1977 from the blood of rabbits put into deep sleep electrically.
The vial contains twenty worked doses. Both water options land exactly on syringe lines and sit above the crowded bottom of the syringe.
Between this page’s two water volumes the draw changes by half again. Between its two vial sizes it doubles.
Both inputs matter when matching a unit reading to a dose. A change in vial strength cannot be ignored just because the water amount is familiar; check the resulting concentration as well as the final number.
Each listed volume gives a whole number of units here. The liquid volume changes the draw for each dose, but does not change how many doses the entered drug mass contains or how long the product remains usable.
No storage limit is assigned to this worked preparation. Twenty is a dose count, not twenty weeks of use.
The calculation uses the drug content entered from the vial label. It cannot independently confirm the identity, amount, purity or sterility of the material in a research product.
Every figure on this page inherits that assertion. The arithmetic cannot be more reliable than the quantity it starts from.
A precise result is therefore not a quality check on the vial. It shows the relationship between the stated inputs, and would change if the actual contents differed from those inputs.
The calculator lets you enter your product’s vial strength and mixing volume, then shows the arithmetic for your syringe.
Open the DSIP calculator →The arithmetic on this page is only half the question. These are the pages that carry the other half.