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Metabolic Research

Incretin & glucose pathway analogs

Tissue Repair Research

BPC, TB-500 & cytoprotective peptides

Growth Factor Research

GH secretagogues & IGF pathway

Receptor & Longevity

Melanocortin, mitochondrial & senolytic

  • ≥99% HPLC Verified
  • Same-Day Shipping from NY
  • COA on every batch
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For Research Use Only. Not for human or veterinary consumption, diagnostic, or therapeutic use. Sold exclusively to qualified research professionals.

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For Research Use Only. Not for human consumption.

Melanotan II

100 in stock

  • ≥99% Purity (HPLC)
  • 3rd-Party Verified
  • Research Use Only
  • Trusted by Researchers
  • HPLC Verified

99.62%

Independent purity assay

  • Tested

US ISO-Accredited Lab

Janoshik Analytical · ISO 17025

3rd-Party Verified Purity

  • 99.2%
View Certificate of Analysis — MT2-262024-028
View COA
Description
Melanotan II is a cyclic heptapeptide analog of α-MSH used in in vitro research on melanocortin receptor (MC1R, MC3-5R) signaling and melanocyte biology.
  • Purity: ≥99% by HPLC
  • Molecular formula: C50H69N15O9
  • Molecular weight: 1024.18 g/mol
  • CAS: 121062-08-6
  • Form: Lyophilized powder
  • Storage: -20°C, protect from light
  • Third-party verified COA included with every batch
For research use only. Not for human or veterinary use.
Shipping & Returns

Free standard shipping on orders over $200

Express shipping available at checkout

All sales are final — no returns or exchanges, as these are research-use peptides

Orders ship in discreet, tracked packaging

Care Instructions

Store sealed lyophilized vials at -20°C, protected from light and moisture

Short-term storage (up to 30 days) acceptable at 2–8°C in original packaging

Allow vials to reach room temperature before opening to prevent condensation

Reconstitute with bacteriostatic water; gently swirl — do not shake or vortex

After reconstitution, store at 2–8°C and use within 30 days

Avoid repeated freeze-thaw cycles; aliquot if longer-term storage is needed

For research use only — handle according to standard laboratory safety practices

Melanotan II

4.9 (412 verified reviews)

30 researchers bought this in the last 24 hours

$26.09

100 in stock

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Estimated Delivery

Order in 10h 36m for same-day shipping

Order placed

Today

Fulfillment

Today

Shipped

Tomorrow

Delivered

2–4 days

Discreet packaging · Cold-chain where required · Fully tracked

Third-Party Tested

Independent HPLC purity verification

Discreet Packaging

Plain box, no branding outside

Free Reship if Damaged

Arrives broken? We send a new one

Reship policy: If your order arrives damaged or contaminated, we will reship a replacement free of charge. Refunds are not offered, only replacements, so every shipment is protected.

Bulk / Institutional Pricing

Ordering 10+ vials? Get a custom quote with volume-tier pricing and purchase order terms.

Same-Day Ship

Order by 2pm ET

COA per Batch

HPLC + Mass Spec

Discreet

Plain packaging

ionicons-v5-n

Technical Specifications

View Certificate of Analysis — MT2-262024-028
Appearance White lyophilized powder
Molecular Formula C50H69N15O9
Molecular Weight 1024.2 Da
CAS Number 121062-08-6
Purity (HPLC) ≥99%
Receptor / Target MC1R / MC3R / MC4R / MC5R
Storage -20°C lyophilized
Reconstitution BAC water

HPLC Analysis

Reverse-phase HPLC with UV detection at 214 nm. Single dominant peak confirms ≥99% purity. Retention time: 9.40 min.

HPLC Analysis

Mass Spectrometry

ESI-MS confirms observed mass of 1024.2 Da, matching theoretical MW within tolerance.

Mass Spectrometry

Reconstitution Calculator

Interactive dilution and dosing reference

Build your protocol
2.50 mg
0.25 mg 10 mg

Protocol Results

Concentration 5.00 mg/mL
Per 0.1 mL 0.50 mg
Draw for dose 50 units
Doses per vial 4

Units shown for U-100 insulin syringe (1 mL = 100 units).

Diluent

Bacteriostatic water (0.9% benzyl alcohol) recommended. Sterile water acceptable for short-term studies.

Storage

Lyophilized: −20°C up to 24 months. Reconstituted: 2–8°C, protected from light.

Stability Window

Reconstituted material remains stable for a minimum of 28 days when refrigerated. Avoid repeated freeze-thaw cycles.

- Supplier data based on publicly disclosed information as of current quarter.

Melanotan II vs PT-141

Head-to-head reference comparison at the receptor and molecular level.

Property
Our Melanotan II
PT-141
Receptor / Target
MC1R / MC3R / MC4R / MC5R
MC3R / MC4R
Molecular Weight
1024.2 Da
1025.2 Da
CAS Number
121062-08-6
189691-06-3
Reported Half-Life
~30 min
~2 hr
Purity Grade
≥99%
≥99%
Research Use
Non-selective melanocortin research
Melanocortin receptor research

Why Researchers Choose Us

How we compare to typical peptide suppliers

Feature
Our Lab
Supplier A
Supplier B
Verified purity (HPLC)
≥ 99.0%
97–98%
Not disclosed
3rd-party COA per batch
On request
Mass spec verification
Cold-chain shipping
US-based facility
Same-day shipping cutoff
2pm ET
Next day
48–72h

- Supplier data based on publicly disclosed information as of current quarter.

Verified Researcher Reviews

From qualified research professionals — institutional affiliation verified

4.9

(412 verified)

★ ★ ★ ★ ★

Very impressed with the quality and presentation. Everything was packaged carefully, the batch details were accurate, and the ordering process was smooth from beginning to end.

Garrett Nichols Verified Researcher
★ ★ ★ ★ ★

Great purchasing experience overall. Delivery was delayed by a day, but the quality of the packaging, labeling, and documentation exceeded my expectations. I would definitely order again.

Bryce Hamilton Verified Researcher
★ ★ ★ ★ ★

Outstanding attention to detail from packaging to documentation. The COA was easy to verify, and the product arrived in perfect condition. Highly professional service.

Colin Murphy Verified Researcher
★ ★ ★ ★ ★

Fast shipping and excellent communication throughout the order. The packaging was secure, the labeling was clear, and everything matched the product description perfectly.

Gavin Thompson Verified Researcher
★ ★ ★ ★ ★

Excellent packaging and professional presentation. The product arrived securely sealed with clear batch information, and the Certificate of Analysis was available exactly as expected. Very satisfied with the overall experience.

Mason Reynolds Verified Researcher

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Frequently Asked Questions

Everything researchers ask before ordering peptides.

All orders ship in plain, discreet packaging with no external branding. Tracking is provided by email within 24 hours. Lyophilized peptides are temperature-stable in transit and do not require refrigerated shipping.

Sealed and stored at −20°C, the lyophilized powder maintains potency for 24+ months. Once reconstituted with bacteriostatic water, store at 2–8°C and use within 30 days.

Yes. Every order ships with a batch-specific COA from an independent ISO/IEC 17025 accredited lab. You can preview the current batch COA above before ordering.

We accept all major credit cards and select alternative methods. Charges appear under a discreet, non-descriptive merchant name on your statement.

We ship within the United States only at this time. International researchers should review their local regulations regarding research-use peptides before placing inquiries.

Allow the vial to equilibrate to room temperature before opening. Inject bacteriostatic water down the side of the vial — do not spray directly onto the lyophilized cake. Swirl gently. Do not shake. Use the on-page reconstitution calculator for exact volumes.

Because these are research-use peptides, all sales are final. If your order arrives damaged or incorrect, contact us within 7 days and we will reship or refund.

No. All products are sold strictly For Research Use Only (RUO). They are not drugs, supplements, cosmetics, or food and are not intended for human or veterinary consumption.

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Made in USA

ISO 9001 certified facility

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3rd-Party Tested

Janoshik Analytical

8,000+ Labs

Trusted since 2021

92% Reorder Rate

Within 60 days

Purity Guarantee

Every vial meets ≥99% purity or we replace it. If it doesn't match its COA, we make it right.

Same-Day Ship from New York

Orders placed by 2pm ET ship the same day from Fifth Avenue. Discreet, tracked, insured.

3rd-Party Verified

Every batch is independently tested by accredited labs. COA published before it ships.

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Certificate of Analysis

Melanotan

Independently tested by Janoshik Analytical, s.r.o.

BatchMT2-262024-028
Test MethodRP-HPLC
ManufacturedMay 31, 2026
TestedJune 12, 2026
ExpiresJune 2028
LaboratoryISO/IEC 17025 accredited
Overall Purity 99.4%

PASSED ALL TESTS

Analytical Results

Test Result Specification Status
Identity (LC-MS) Confirmed Conforms PASS
Purity (HPLC-UV) 99.4% ≥ 98.0% PASS
Related substances < 1.0% ≤ 2.0% PASS
Water content (KF) 1.8% ≤ 5.0% PASS
Residual solvents Not detected ICH Q3C PASS
Heavy metals (ICP-MS) < 1 ppm ≤ 10 ppm PASS
Bacterial endotoxins < 0.125 EU/mg ≤ 0.5 EU/mg PASS
Sterility Pass USP USP PASS

This Certificate of Analysis is issued by an independent ISO/IEC 17025 accredited laboratory and verifies the identity, purity, and quality of the batch listed above. A copy is shipped with every order.