For laboratory research use only. Not for human consumption. Not for clinical or therapeutic use. Not evaluated by the FDA.
For laboratory research use only. Not for human consumption. Not for clinical or therapeutic use. Not evaluated by the FDA.
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Research Tools
PT-141dosage & bacteriostatic water calculator — stock concentration and syringe units.
PT-141 (bremelanotide) is a synthetic cyclic heptapeptide melanocortin-receptor agonist studied in vitro at MC3R and MC4R. It ships lyophilized in a 10 mg vial and is reconstituted with bacteriostatic water. This calculator presets PT-141 so you can turn a vial and a water volume into an exact stock concentration and syringe draw.
Reconstitution
Syringe
U-100 · 100 units = 1 mLDraw to
5units
= 0.05 mL on the 1.0 mL syringe
At 5 mg/mL, draw 0.05 mL to measure 250 mcg.
Molecular weight is informational; the reconstitution math depends only on the mass in the vial and the water you add.
Reconstitute a 10 mg PT-141 vial with 2 mL of bacteriostatic water:
5
mg/mL
5,000
mcg/mL
To measure 250 mcg at that concentration you would draw 5 units (0.05 mL) on a U-100 insulin syringe. Change the vial size, water, or target in the calculator above for your own numbers.
Stock concentration (mg/mL) for PT-141's vial size at common bacteriostatic-water volumes.
| Vial | 1 mL | 2 mL | 3 mL |
|---|---|---|---|
| 10 mg | 10 mg/mL | 5 mg/mL | 3.33 mg/mL |
Multiply mg/mL by 1,000 for mcg/mL. On a U-100 syringe, 1 mL = 100 units.
The volume sets the concentration: 10 mg in 2 mL is 5 mg/mL (5,000 mcg/mL); 10 mg in 1 mL is 10 mg/mL. Pick the volume that lands your target on a readable syringe mark.
10 mg in 1, 2, or 3 mL gives 10, 5, or about 3.33 mg/mL. The calculator shows mg/mL and mcg/mL live as you type.
Refrigerated at 2–8 °C, out of light, in single-use aliquots. This is laboratory storage guidance, not administration guidance.
PT-141 is studied in preclinical, in-vitro melanocortin (MC3R/MC4R) signaling research. For laboratory research use only.
Related terms: bacteriostatic water, aliquot, freeze thaw, aggregation
This calculator prepares and measures research stock solutions and is provided for informational purposes for qualified researchers. All compounds sold by Ascension Labs are for laboratory research use only; not for human or veterinary use. Nothing here is dosing, administration, or medical guidance.
