Laboratory calculator
Semax Reconstitution Calculator (25 mg vial)
Worked example
With 25 mg of Semax in 2 mL, the concentration is 25 / 2 = 12.5 mg/mL. A 250 mcg example amount (0.25 mg) needs 0.25 / 12.5 = 0.02 mL, or 2 units on a U-100 syringe, and 25,000 mcg divided by 250 mcg gives 100 aliquots per vial.
How it works
- Concentration = vial mass / water volume: 25 mg / 2 mL = 12.5 mg/mL.
- Aliquot volume = target amount / concentration: 0.25 mg / 12.5 mg/mL = 0.02 mL.
- Units on a U-100 syringe = mL x 100 = 2.
- Aliquots per vial = vial mass in mcg / target amount = 25,000 / 250.
Frequently asked questions
How much water does a 25 mg vial of Semax need for 12.5 mg/mL?
Concentration is vial mass divided by water volume: 25 mg / 2 mL = 12.5 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 Semax?
At 12.5 mg/mL a 250 mcg example amount is 0.02 mL, which is 2 units because 1 unit on a U-100 syringe equals 0.01 mL.
How many 250 mcg aliquots are in a 25 mg vial of Semax?
25 mg is 25,000 mcg, and 25,000 mcg divided by 250 mcg gives 100 aliquots, before allowing for volume lost to priming and syringe dead space.