Important dilution note: Cloudiness after dilution is most commonly associated with non-pharmaceutical-grade dilution solution. Cloudy product concerns are not eligible for refund unless Pfizer pharmaceutical-grade dilution solution was used.

Vial Size: 3ml

Form: White Lyophilized Powder

CAS Number: 189691-06-3

Chemical Name: Bremelanotide

Synonyms: PT-141; Melanotan II derivative; MC3R/MC4R agonist

Molecular Formula: C₅₀H₆₈N₁₄O₁₀

Molecular Weight: 1,025.2 g/mol

Sequence: Cyclic heptapeptide; synthetic analog of Melanotan II with a lactam bridge between Asp and Lys residues; lacks the alpha-MSH carboxy-terminal amide

Purity: ≥98% (HPLC) — see batch COA

Form: Lyophilized white to off-white powder

Storage Conditions: Store at −20°C, desiccated, protected from light. Stable 24 months lyophilized.

Solubility: Soluble in sterile water or 0.1% acetic acid at ≥1 mg/mL

Receptor Activity: Agonist at melanocortin receptors MC3R and MC4R; studied for central nervous system melanocortin signaling

Certificate of Analysis: Available for all batches.

For research and laboratory use only. Not for human or animal consumption. This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease or condition. For use by qualified research professionals only.