# PT-141 Nasal Spray

> Ready-mixed bremelanotide solution in a 15 mL metered nasal pump

All products are sold strictly for laboratory research use only. Not for human or veterinary use.

- Web page: https://peptidemedixeu.com/en/products/pt-141-nasal-spray/
- Brand: Peptide Medix EU
- Category: [Libido & Sexual Function](https://peptidemedixeu.com/en/collections/libido-peptides/)
- from €102 (EUR)

## Sizes and prices (EUR)

| Size | Price | SKU |
| --- | --- | --- |
| 15 mL · 10 mg | €102 | PT-141-NASAL-SPRAY-15-ML-10-MG |
| 15 mL · 20 mg | €161 | PT-141-NASAL-SPRAY-15-ML-20-MG |

_Catalog prices at build time; the web page and checkout are authoritative._

## Specifications

- **Peptide class:** Cyclic heptapeptide melanocortin (MC3R/MC4R) agonist
- **Form:** Aqueous solution, 15 mL amber bottle with metered nasal pump
- **Available sizes:** 15 mL containing 10 mg; 15 mL containing 20 mg
- **Nominal concentration:** ≈0.67 mg/mL (10 mg fill) or ≈1.33 mg/mL (20 mg fill)
- **Active component:** PT-141 (bremelanotide), ≥99% by HPLC
- **CAS number (active):** 189691-06-3
- **Molecular formula (active):** C50H68N14O10
- **Molecular weight (active):** 1025.16 g/mol
- **Vehicle:** Aqueous, preserved for multi-draw handling; clear and colourless when fresh
- **Purity documentation:** Lot-matched COA for the peptide used in the fill
- **Research areas:** Intranasal peptide delivery, mucosal absorption, formulation stability, melanocortin pharmacology
- **Storage:** 2–8 °C upright, protected from light; do not freeze the filled bottle

## Description

Here PT-141 (bremelanotide) comes as a pre-mixed water-based solution in a 15 mL amber bottle with a metered nasal pump. The peptide matches our lyophilised vials — a cyclic seven-residue melanocortin agonist favouring MC3R and MC4R — but is offered pre-dissolved for intranasal use, so researchers studying mucosal delivery don't need to reconstitute and transfer powder.

The same ring structure that makes bremelanotide sturdy also makes a ready-mixed solution feasible. The ring is closed by a lactam bond between aspartate and lysine side chains, not by a disulfide, so no thiol-exchange chemistry needs managing in solution, and the acetylated N-terminus, norleucine and D-phenylalanine all slow exopeptidases. Fills of 10 mg or 20 mg in 15 mL give nominal strengths of roughly 0.67 and 1.33 mg/mL. Studies with this format are usually about the route rather than the molecule: deposition, residence on and clearance from the mucosa, stability of the formulation over a study, and comparison with the sublingual troche and the reconstituted vial listed next to it.

## Frequently asked questions

### What does each bottle contain?

Both options hold 15 mL, loaded with either 10 mg or 20 mg of PT-141 — nominal strengths of about 0.67 mg/mL and 1.33 mg/mL. How much is delivered per press depends on the pump's metered volume, which you should verify by weighing for your records.

### Can I get a certificate of analysis?

Every bottle traces back to a COA for the peptide in its fill, showing HPLC purity of ≥99% and identity confirmed by mass spectrometry. Please quote the lot number on the label when requesting it.

### When is the nasal format preferable to powder?

A pre-mixed solution eliminates reconstitution error and keeps concentration steady across a study, and it is the right test article when mucosal delivery itself is the question — deposition, clearance, formulation stability or route comparison. If you want to set concentrations for assays, the lyophilised vial offers more flexibility.

### How is it stored, and how long does it keep?

Keep it upright at 2–8 °C in the dark and never freeze it. Solutions break down faster than lyophilised powder, so define an in-use period in your protocol and confirm the concentration analytically in long studies. Discard it if it turns cloudy or discoloured or shows particles.

### Can I use it as a needle-free option for myself?

No. The familiar packaging doesn't make it a consumer product; it is a research chemical supplied only for laboratory investigation.

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All products offered on this website are intended solely for in-vitro laboratory research and development by qualified professionals. They are not drugs, foods, cosmetics or dietary supplements, and are not intended to diagnose, treat, cure or prevent any disease. Products must not be introduced into humans or animals in any manner. By purchasing, you confirm that you are a qualified researcher and accept full responsibility for handling and storage in accordance with applicable laws.

Peptide Medix EU · https://peptidemedixeu.com/en/products/pt-141-nasal-spray/