Nonapeptide-1: Alpha-MSH Antagonist for Targeted Skin Brightening
Nonapeptide-1 (INCI: Nonapeptide-1, CAS 158563-45-2) is a nine-amino-acid synthetic peptide with a molecular weight of 1047.15 g/mol. Its sequence – Met-Pro-D-Phe-Arg-D-Trp-Phe-Lys-Pro-Val-NH2 – was engineered as a competitive antagonist of alpha-melanocyte-stimulating hormone (alpha-MSH) at the melanocortin-1 receptor (MC1R). Unlike tyrosinase inhibitors that intervene downstream in the melanin pathway, Nonapeptide-1 operates at the receptor signaling level, preventing the initial cascade that triggers melanogenesis.
Mechanism of Action: MC1R Receptor Blockade
When UV radiation hits the skin, keratinocytes release alpha-MSH, which binds MC1R on melanocyte surfaces. This binding activates adenylate cyclase, raises intracellular cAMP, and ultimately upregulates tyrosinase transcription through MITF phosphorylation. Nonapeptide-1 competes directly with alpha-MSH for the MC1R binding site, blocking receptor activation before the signaling cascade begins. The result is a measurable decrease in melanin production without direct cytotoxicity to melanocytes – a critical distinction from hydroquinone, which achieves depigmentation partly through melanocyte damage.
Efficacy Data
In melanocyte culture assays at 50 ppm concentration, Nonapeptide-1 reduced total melanin content by 42% compared to untreated controls. This reduction was dose-dependent and reversible upon peptide withdrawal, confirming a non-cytotoxic mechanism. The peptide showed no effect on melanocyte viability at concentrations up to 200 ppm, supporting its safety profile for long-term cosmetic use.
Formulation Guidelines
Nonapeptide-1 is water-soluble and stable within a pH range of 5.0 to 7.0. Recommended use concentration sits between 50 and 500 ppm in finished formulations. Process temperatures must remain below 45 degrees Celsius – add the peptide during the cool-down phase of emulsion manufacturing or directly to aqueous serums at room temperature. The peptide is compatible with most cosmetic ingredients but should be kept separate from strong oxidizing agents and extreme pH conditions during storage.
Target Applications
- Brightening and tone-correcting serums targeting post-inflammatory hyperpigmentation
- Anti-spot treatments as a non-cytotoxic alternative to hydroquinone
- Overnight brightening masks with sustained peptide delivery
- Sun care after-sun products to limit UV-triggered melanogenesis
- Combination formulations with Glutathione, Hexapeptide-2, or Tetrapeptide-30 for multi-pathway brightening
Technical Specifications
| Parameter | Value |
|---|---|
| INCI Name | Nonapeptide-1 |
| CAS Number | 158563-45-2 |
| Molecular Weight | 1047.15 g/mol |
| Purity (HPLC) | ≥98% |
| Solubility | Water soluble |
| Recommended pH | 5.0 – 7.0 |
| Use Level | 50 – 500 ppm |
| Storage | Below 45 C, protect from light |
Why Source Nonapeptide-1 from TCS NEXUS S.L.?
TCS NEXUS S.L., based in Valencia, Spain, supplies Nonapeptide-1. Every batch ships with a full Certificate of Analysis including HPLC purity, mass spectrometry confirmation, and amino acid analysis. Minimum order quantity starts at 1 g for evaluation purposes, scaling to 100 g for production runs. Standard EU delivery takes 5 to 7 business days from order confirmation.
Frequently Asked Questions
How does Nonapeptide-1 differ from hydroquinone in brightening mechanisms?
Hydroquinone inhibits tyrosinase directly and can cause melanocyte cytotoxicity at higher concentrations. Nonapeptide-1 works upstream by blocking alpha-MSH from activating the MC1R receptor, preventing the signaling cascade that leads to melanin production. This receptor-level intervention preserves melanocyte viability while reducing melanin output by 42% at 50 ppm in culture studies.
Can Nonapeptide-1 be combined with other brightening peptides?
Combining Nonapeptide-1 with complementary actives is a proven formulation strategy. Hexapeptide-2 targets a different step in melanogenesis, while Tetrapeptide-30 and Glutathione provide additional pathways for melanin reduction. Multi-peptide brightening serums using 2-3 of these actives address pigmentation through parallel mechanisms for enhanced results.
What is the minimum order quantity for evaluation?
TCS NEXUS S.L. offers a 1 g minimum order for formulation testing and stability studies. Production orders start at 100 g. All orders ship within the EU in 5 to 7 business days with full documentation and Certificate of Analysis.
Further reading: See also: Cosmetic Peptides Technical Guide
Technical Profile
Nonapeptide-1 is a melanogenesis-inhibiting peptide that reduces pigmentation by blocking alpha-MSH signaling, making it a leading active for brightening serums, dark-spot correctors, and tone-evening formulations.
Best-Fit Applications
- Pigmentation-control and dark-spot product lines
- Brightening serums and tone-evening concepts
- Projects combining brightening and antioxidant peptide actives
Related Peptide Portfolio: TCS NEXUS supplies a connected range of anti-aging, brightening, repair, and matrix-support peptides for cosmetic formulators across Europe.
Technical Support and Samples
Request COA documents, sample availability, or support for custom synthesis.