Laboratory calculator

Selank Reconstitution Calculator (5 mg vial)

Worked example

With 5 mg of Selank in 2 mL, the concentration is 5 / 2 = 2.5 mg/mL. A 250 mcg example amount (0.25 mg) needs 0.25 / 2.5 = 0.1 mL, or 10 units on a U-100 syringe, and 5,000 mcg divided by 250 mcg gives 20 aliquots per vial.

Reconstitution calculator

Vial size (mg)

Bacteriostatic water added (mL)

Target amount per draw (mcg)

Syringe (U-100)

Sizes in the Pepcore catalogue10 mg

Concentration: 2.5 mg/mL
Volume to draw: 0.1 mL
Units on a U-100 syringe: 10 units
Draws per vial: 20

How it works

Concentration = vial mass / water volume: 5 mg / 2 mL = 2.5 mg/mL.
Aliquot volume = target amount / concentration: 0.25 mg / 2.5 mg/mL = 0.1 mL.
Units on a U-100 syringe = mL x 100 = 10.
Aliquots per vial = vial mass in mcg / target amount = 5,000 / 250.

Frequently asked questions

How much water does a 5 mg vial of Selank need for 2.5 mg/mL?

Concentration is vial mass divided by water volume: 5 mg / 2 mL = 2.5 mg/mL. Change the water volume in the calculator to see how the concentration and the syringe reading move together.

How many units on a U-100 syringe is a 250 mcg example amount of Selank?

At 2.5 mg/mL a 250 mcg example amount is 0.1 mL, which is 10 units because 1 unit on a U-100 syringe equals 0.01 mL.

How many 250 mcg aliquots are in a 5 mg vial of Selank?

5 mg is 5,000 mcg, and 5,000 mcg divided by 250 mcg gives 20 aliquots, before allowing for volume lost to priming and syringe dead space.