How many units is each Selank amount?
At 10 mg + 2 mL (5 mg/mL) on a U-100 syringe:
Generated from the calculator's own functions. Rows are evenly spaced reference amounts, not suggested amounts. Amber readings don't fit a 100-unit barrel.
| Amount | mg | Volume (mL) | Syringe units |
|---|---|---|---|
| 100 mcg | 0.1 | 0.02 | 2 |
| 200 mcg | 0.2 | 0.04 | 4 |
| 250 mcg | 0.25 | 0.05 | 5 |
| 300 mcg | 0.3 | 0.06 | 6 |
| 400 mcg | 0.4 | 0.08 | 8 |
| 500 mcg | 0.5 | 0.1 | 10 |
| 750 mcg | 0.75 | 0.15 | 15 |
| 1,000 mcg | 1 | 0.2 | 20 |
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How much water for each Selank vial size?
Selank is sold in one common size (10 mg). The same water volume gives a different concentration in each, so the same reading means a different amount. Each cell shows mcg per unit with mg/mL in brackets.
| Vial | 1 mL | 2 mL | 3 mL | 5 mL |
|---|---|---|---|---|
| 10 mg | 100 (10) | 50 (5) | 33.33 (3.33) | 20 (2) |
How much bacteriostatic water for a 10 mg Selank vial?
1 mL → 10 mg/mL, so 250 mcg is 2.5 units. 2 mL → 5 mg/mL, so 250 mcg is 5 units. 3 mL → 3.33 mg/mL, so 250 mcg is 7.5 units. The whole vial holds 40 draws of 250 mcg.
Worked example: 10 mg vial, 2 mL, 250 mcg
- Concentration. 10 mg ÷ 2 mL = 5 mg/mL (5,000 mcg/mL).
- Volume. 0.25 mg ÷ 5 mg/mL = 0.05 mL.
- Units. 0.05 mL × 100 = 5 units on a U-100 syringe.
- Check. One unit holds 50 mcg; 5 × 50 mcg = 250 mcg = 0.25 mg, which matches. The vial holds 40 draws of this size.
Selank: notes for the arithmetic
Selank is often prepared for nasal-spray research rather than syringe measurement. For a spray bottle the useful figure is mg/mL (concentration). Syringe units only apply when measuring with an insulin syringe.
For the lab procedure itself (materials, aseptic technique, mixing without foaming) see how to reconstitute peptides. For what bacteriostatic water is and how long an opened vial is kept, see the bacteriostatic water guide and the storage guide.
Frequently asked questions
How many units is 250 mcg of Selank?
It depends on the water volume. 10 mg + 2 mL = 5 mg/mL, so 250 mcg is 0.05 mL, or 5 units on a U-100 syringe. With 1 mL instead it would be 2.5 units.
How much bacteriostatic water for a 10 mg Selank vial?
There is no single correct volume. 1 mL gives 10 mg/mL (100 mcg per unit); 2 mL gives 5 mg/mL (50 mcg per unit); 3 mL gives 3.33 mg/mL (33.33 mcg per unit). Pick the volume that makes your reading easy to measure on the barrel you have.
How many mg of Selank is 10 units?
10 units on a U-100 syringe is 0.1 mL. At 5 mg/mL (10 mg in 2 mL) that is 0.5 mg (500 mcg). At a different concentration the answer is different.
Is this a Selank dosing calculator?
It is an arithmetic tool. It converts an amount you enter into a volume and a syringe reading; it does not suggest amounts, schedules or uses. Not approved by the FDA for any use. Sold as a research chemical only.
Sources
Links checked 2026-10-19.